int main()
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Create space, set Dirichlet BC, enumerate basis functions.
Space* space = new Space(A, B, NELEM, DIR_BC_LEFT, DIR_BC_RIGHT, P_INIT, NEQ, NEQ);
// Enumerate basis functions, info for user.
int ndof = Space::get_num_dofs(space);
info("ndof: %d", ndof);
// Initialize the weak formulation.
WeakForm wf(2);
wf.add_matrix_form(0, 0, jacobian_0_0);
wf.add_matrix_form(0, 1, jacobian_0_1);
wf.add_matrix_form(1, 0, jacobian_1_0);
wf.add_matrix_form(1, 1, jacobian_1_1);
wf.add_vector_form(0, residual_0);
wf.add_vector_form(1, residual_1);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem *dp = new DiscreteProblem(&wf, space, is_linear);
// Newton's loop.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec = new double[Space::get_num_dofs(space)];
get_coeff_vector(space, coeff_vec);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
int it = 1;
bool success = false;
while (1)
{
// Obtain the number of degrees of freedom.
int ndof = Space::get_num_dofs(space);
// Assemble the Jacobian matrix and residual vector.
dp->assemble(coeff_vec, matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i<ndof; i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!(success = solver->solve()))
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof; i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec, space);
it++;
}
info("Total running time: %g s", cpu_time.accumulated());
// Test variable.
info("ndof = %d.", Space::get_num_dofs(space));
// Cleanup.
for(unsigned i = 0; i < DIR_BC_LEFT.size(); i++)
delete DIR_BC_LEFT[i];
DIR_BC_LEFT.clear();
for(unsigned i = 0; i < DIR_BC_RIGHT.size(); i++)
delete DIR_BC_RIGHT[i];
DIR_BC_RIGHT.clear();
delete matrix;
delete rhs;
delete solver;
delete[] coeff_vec;
delete dp;
delete space;
if (success)
{
info("Success!");
return ERROR_SUCCESS;
}
else
{
info("Failure!");
return ERROR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("square_quad.mesh", &mesh);
// Perform initial mesh refinement.
for (int i = 0; i < INIT_REF_NUM; i++) mesh.refine_all_elements();
// Enter boundary markers.
BCTypes bc_types;
bc_types.add_bc_dirichlet(BDY_DIRICHLET);
bc_types.add_bc_neumann(BDY_NEUMANN_LEFT);
// Enter Dirichlet boudnary values.
BCValues bc_values;
bc_values.add_function(BDY_DIRICHLET, essential_bc_values);
// Create an H1 space with default shapeset.
H1Space space(&mesh, &bc_types, &bc_values, P_INIT);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(callback(bilinear_form), HERMES_SYM);
wf.add_vector_form(linear_form, linear_form_ord);
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Set exact solution.
ExactSolution exact(&mesh, fndd);
// Initialize views.
ScalarView sview("Solution", new WinGeom(0, 0, 440, 350));
sview.show_mesh(false);
OrderView oview("Polynomial orders", new WinGeom(450, 0, 420, 350));
// DOF and CPU convergence graphs.
SimpleGraph graph_dof, graph_cpu, graph_dof_exact, graph_cpu_exact;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = construct_refined_space(&space);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solution.
Solution ref_sln;
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
Solution sln;
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// View the coarse mesh solution and polynomial orders.
sview.show(&sln);
oview.show(&space);
// Calculate element errors and total error estimate.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(&space, HERMES_H1_NORM);
bool solutions_for_adapt = true;
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln, solutions_for_adapt, HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_REL) * 100;
// Calculate exact error for each solution component.
solutions_for_adapt = false;
double err_exact_rel = adaptivity->calc_err_exact(&sln, &exact, solutions_for_adapt, HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_REL) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space));
info("err_est_rel: %g%%, err_exact_rel: %g%%", err_est_rel, err_exact_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
graph_dof_exact.add_values(Space::get_num_dofs(&space), err_exact_rel);
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel);
graph_cpu_exact.save("conv_cpu_exact.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
// Increase the counter of performed adaptivity steps.
if (done == false) as++;
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false) delete ref_space->get_mesh();
delete ref_space;
delete dp;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
// Wait for all views to be closed.
View::wait();
return 0;
}
int main()
{
// Create space.
// Transform input data to the format used by the "Space" constructor.
SpaceData *md = new SpaceData();
Space* space = new Space(md->N_macroel, md->interfaces, md->poly_orders, md->material_markers, md->subdivisions, N_GRP, N_SLN);
delete md;
// Enumerate basis functions, info for user.
int ndof = Space::get_num_dofs(space);
info("ndof: %d", ndof);
// Plot the space.
space->plot("space.gp");
for (int g = 0; g < N_GRP; g++)
{
space->set_bc_left_dirichlet(g, flux_left_surf[g]);
space->set_bc_right_dirichlet(g, flux_right_surf[g]);
}
// Initialize the weak formulation.
WeakForm wf(2);
wf.add_matrix_form(0, 0, jacobian_mat1_0_0, NULL, mat1);
wf.add_matrix_form(0, 0, jacobian_mat2_0_0, NULL, mat2);
wf.add_matrix_form(0, 0, jacobian_mat3_0_0, NULL, mat3);
wf.add_matrix_form(0, 1, jacobian_mat1_0_1, NULL, mat1);
wf.add_matrix_form(0, 1, jacobian_mat2_0_1, NULL, mat2);
wf.add_matrix_form(0, 1, jacobian_mat3_0_1, NULL, mat3);
wf.add_matrix_form(1, 0, jacobian_mat1_1_0, NULL, mat1);
wf.add_matrix_form(1, 0, jacobian_mat2_1_0, NULL, mat2);
wf.add_matrix_form(1, 0, jacobian_mat3_1_0, NULL, mat3);
wf.add_matrix_form(1, 1, jacobian_mat1_1_1, NULL, mat1);
wf.add_matrix_form(1, 1, jacobian_mat2_1_1, NULL, mat2);
wf.add_matrix_form(1, 1, jacobian_mat3_1_1, NULL, mat3);
wf.add_vector_form(0, residual_mat1_0, NULL, mat1);
wf.add_vector_form(0, residual_mat2_0, NULL, mat2);
wf.add_vector_form(0, residual_mat3_0, NULL, mat3);
wf.add_vector_form(1, residual_mat1_1, NULL, mat1);
wf.add_vector_form(1, residual_mat2_1, NULL, mat2);
wf.add_vector_form(1, residual_mat3_1, NULL, mat3);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem *dp = new DiscreteProblem(&wf, space, is_linear);
// Newton's loop.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec = new double[Space::get_num_dofs(space)];
get_coeff_vector(space, coeff_vec);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
int it = 1;
while (1)
{
// Obtain the number of degrees of freedom.
int ndof = Space::get_num_dofs(space);
// Assemble the Jacobian matrix and residual vector.
dp->assemble(coeff_vec, matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i<ndof; i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!solver->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof; i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec, space);
it++;
}
// Plot the solution.
Linearizer l(space);
l.plot_solution("solution.gp");
info("Done.");
return 0;
}
int main() {
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Create coarse mesh, set Dirichlet BC, enumerate basis functions.
Space* space = new Space(A, B, NELEM, DIR_BC_LEFT, DIR_BC_RIGHT, P_INIT, NEQ);
// Enumerate basis functions, info for user.
int ndof = Space::get_num_dofs(space);
info("ndof: %d", ndof);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(jacobian);
wf.add_vector_form(residual);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem *dp_coarse = new DiscreteProblem(&wf, space, is_linear);
// Newton's loop on coarse mesh.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec_coarse = new double[Space::get_num_dofs(space)];
get_coeff_vector(space, coeff_vec_coarse);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix_coarse = create_matrix(matrix_solver);
Vector* rhs_coarse = create_vector(matrix_solver);
Solver* solver_coarse = create_linear_solver(matrix_solver, matrix_coarse, rhs_coarse);
int it = 1;
while (1) {
// Obtain the number of degrees of freedom.
int ndof_coarse = Space::get_num_dofs(space);
// Assemble the Jacobian matrix and residual vector.
dp_coarse->assemble(coeff_vec_coarse, matrix_coarse, rhs_coarse);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs_coarse);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL_COARSE && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i < ndof_coarse; i++) rhs_coarse->set(i, -rhs_coarse->get(i));
// Solve the linear system.
if(!solver_coarse->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof_coarse; i++) coeff_vec_coarse[i] += solver_coarse->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec_coarse, space);
it++;
}
// Cleanup.
delete matrix_coarse;
delete rhs_coarse;
delete solver_coarse;
delete [] coeff_vec_coarse;
delete dp_coarse;
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_est, graph_cpu_est;
SimpleGraph graph_dof_exact, graph_cpu_exact;
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = construct_refined_space(space);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Newton's loop on the fine mesh.
info("Solving on fine mesh:");
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec = new double[Space::get_num_dofs(ref_space)];
get_coeff_vector(ref_space, coeff_vec);
int it = 1;
while (1)
{
// Obtain the number of degrees of freedom.
int ndof = Space::get_num_dofs(ref_space);
// Assemble the Jacobian matrix and residual vector.
dp->assemble(coeff_vec, matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(ref_space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL_REF && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i = 0; i < ndof; i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!solver->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof; i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec, ref_space);
it++;
}
// Starting with second adaptivity step, obtain new coarse
// mesh solution via projecting the fine mesh solution.
if(as > 1)
{
info("Projecting the fine mesh solution onto the coarse mesh.");
// Project the fine mesh solution (defined on space_ref) onto the coarse mesh (defined on space).
OGProjection::project_global(space, ref_space, matrix_solver);
}
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
double err_est_array[MAX_ELEM_NUM];
double err_est_rel = calc_err_est(NORM, space, ref_space, err_est_array) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(space), Space::get_num_dofs(ref_space), err_est_rel);
// Time measurement.
cpu_time.tick();
// If exact solution available, also calculate exact error.
if (EXACT_SOL_PROVIDED)
{
// Calculate element errors wrt. exact solution.
double err_exact_rel = calc_err_exact(NORM, space, exact_sol, NEQ, A, B) * 100;
// Info for user.
info("Relative error (exact) = %g %%", err_exact_rel);
// Add entry to DOF and CPU convergence graphs.
graph_dof_exact.add_values(Space::get_num_dofs(space), err_exact_rel);
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel);
}
// Add entry to DOF and CPU convergence graphs.
graph_dof_est.add_values(Space::get_num_dofs(space), err_est_rel);
graph_cpu_est.add_values(cpu_time.accumulated(), err_est_rel);
// If err_est_rel too large, adapt the mesh.
if (err_est_rel < NEWTON_TOL_REF) done = true;
else
{
info("Adapting the coarse mesh.");
adapt(NORM, ADAPT_TYPE, THRESHOLD, err_est_array, space, ref_space);
}
as++;
// Plot meshes, results, and errors.
adapt_plotting(space, ref_space, NORM, EXACT_SOL_PROVIDED, exact_sol);
// Cleanup.
delete solver;
delete matrix;
delete rhs;
delete ref_space;
delete dp;
delete [] coeff_vec;
}
while (done == false);
info("Total running time: %g s", cpu_time.accumulated());
// Save convergence graphs.
graph_dof_est.save("conv_dof_est.dat");
graph_cpu_est.save("conv_cpu_est.dat");
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.save("conv_cpu_exact.dat");
return 0;
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("lshape.mesh", &mesh); // quadrilaterals
// Perform initial mesh refinements.
for (int i=0; i<INIT_REF_NUM; i++) mesh.refine_all_elements();
// Create an H1 space with default shapeset.
H1Space space(&mesh, bc_types, essential_bc_values, P_INIT);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(callback(bilinear_form), HERMES_SYM);
wf.add_vector_form(callback(linear_form));
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Set exact solution.
ExactSolution exact(&mesh, fndd);
// DOF and CPU convergence graphs.
SimpleGraph graph_dof, graph_cpu, graph_dof_exact, graph_cpu_exact;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = construct_refined_space(&space);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solution.
Solution ref_sln;
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
Solution sln;
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// Calculate element errors and total error estimate.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(&space, HERMES_H1_NORM);
bool solutions_for_adapt = true;
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln, solutions_for_adapt, HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_REL) * 100;
// Calculate exact error for each solution component.
solutions_for_adapt = false;
double err_exact_rel = adaptivity->calc_err_exact(&sln, &exact, solutions_for_adapt, HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_REL) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space));
info("err_est_rel: %g%%, err_exact_rel: %g%%", err_est_rel, err_exact_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
graph_dof_exact.add_values(Space::get_num_dofs(&space), err_exact_rel);
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel);
graph_cpu_exact.save("conv_cpu_exact.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
// Increase the counter of performed adaptivity steps.
if (done == false) as++;
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false) delete ref_space->get_mesh();
delete ref_space;
delete dp;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(&space);
#define ERROR_SUCCESS 0
#define ERROR_FAILURE -1
int n_dof_allowed = 660;
printf("n_dof_actual = %d\n", ndof);
printf("n_dof_allowed = %d\n", n_dof_allowed);
if (ndof <= n_dof_allowed) {
printf("Success!\n");
return ERROR_SUCCESS;
}
else {
printf("Failure!\n");
return ERROR_FAILURE;
}
}
int main() {
// Create space, set Dirichlet BC, enumerate basis functions.
Space* space = new Space(A, B, NELEM, DIR_BC_LEFT, DIR_BC_RIGHT, P_INIT, NEQ);
info("ndof = %d", Space::get_num_dofs(space));
// Initialize the weak formulation.
WeakForm wf(4);
wf.add_matrix_form(0, 0, jacobian_1_1);
wf.add_matrix_form(0, 2, jacobian_1_3);
wf.add_matrix_form(0, 3, jacobian_1_4);
wf.add_matrix_form(1, 1, jacobian_2_2);
wf.add_matrix_form(1, 2, jacobian_2_3);
wf.add_matrix_form(1, 3, jacobian_2_4);
wf.add_matrix_form(2, 0, jacobian_3_1);
wf.add_matrix_form(2, 1, jacobian_3_2);
wf.add_matrix_form(2, 2, jacobian_3_3);
wf.add_matrix_form(3, 0, jacobian_4_1);
wf.add_matrix_form(3, 1, jacobian_4_2);
wf.add_matrix_form(3, 3, jacobian_4_4);
wf.add_vector_form(0, residual_1);
wf.add_vector_form(1, residual_2);
wf.add_vector_form(2, residual_3);
wf.add_vector_form(3, residual_4);
wf.add_matrix_form_surf(0, 0, jacobian_surf_right_U_Re_Re, BOUNDARY_RIGHT);
wf.add_matrix_form_surf(0, 2, jacobian_surf_right_U_Re_Im, BOUNDARY_RIGHT);
wf.add_matrix_form_surf(1, 1, jacobian_surf_right_U_Im_Re, BOUNDARY_RIGHT);
wf.add_matrix_form_surf(1, 3, jacobian_surf_right_U_Im_Im, BOUNDARY_RIGHT);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem *dp = new DiscreteProblem(&wf, space, is_linear);
// Set zero initial condition.
double *coeff_vec = new double[Space::get_num_dofs(space)];
set_zero(coeff_vec, Space::get_num_dofs(space));
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
int it = 1;
while (1) {
// Assemble the Jacobian matrix and residual vector.
dp->assemble(coeff_vec, matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i = 0; i < Space::get_num_dofs(space); i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!solver->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < Space::get_num_dofs(space); i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
it++;
}
// Plot the solution.
Linearizer l(space);
l.plot_solution("solution.gp");
// cleaning
delete dp;
delete rhs;
delete solver;
delete[] coeff_vec;
delete space;
delete bc_u_re_left;
delete bc_u_im_left;
delete matrix;
info("Done.");
return 0;
}
int main(int argc, char* argv[])
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("../domain.mesh", &mesh);
// Perform initial mesh refinements.
for (int i = 0; i < INIT_REF_NUM; i++) mesh.refine_all_elements();
// Initialize boundary conditions.
DefaultEssentialBCConst bc_essential("Source", P_SOURCE);
EssentialBCs bcs(&bc_essential);
// Create an H1 space with default shapeset.
H1Space space(&mesh, &bcs, P_INIT);
int ndof = Space::get_num_dofs(&space);
info("ndof = %d", ndof);
// Initialize the weak formulation.
CustomWeakFormAcoustics wf(BDY_NEWTON, RHO, SOUND_SPEED, OMEGA);
// Initialize coarse and reference mesh solution.
Solution sln, ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Initialize views.
//ScalarView sview("Solution", new WinGeom(0, 0, 330, 350));
//sview.show_mesh(false);
//sview.fix_scale_width(50);
//OrderView oview("Polynomial orders", new WinGeom(340, 0, 300, 350));
// DOF and CPU convergence graphs initialization.
SimpleGraph graph_dof, graph_cpu;
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
if (matrix_solver == SOLVER_AZTECOO) {
((AztecOOSolver*) solver)->set_solver(iterative_method);
((AztecOOSolver*) solver)->set_precond(preconditioner);
// Using default iteration parameters (see solver/aztecoo.h).
}
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = Space::construct_refined_space(&space);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solution.
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// View the coarse mesh solution and polynomial orders.
//sview.show(&sln);
//oview.show(&space);
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
Adapt* adaptivity = new Adapt(&space);
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space), err_est_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
delete adaptivity;
if (done == false)
delete ref_space->get_mesh();
delete ref_space;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
// Clean up.
delete solver;
delete matrix;
delete rhs;
// Show the reference solution - the final result.
//sview.set_title("Fine mesh solution");
//sview.show(&ref_sln);
// Wait for all views to be closed.
//View::wait();
//return 0;
ndof = Space::get_num_dofs(&space);
#define ERROR_SUCCESS 0
#define ERROR_FAILURE -1
int ndof_allowed = 460;
printf("ndof allowed = %d\n", ndof_allowed);
printf("ndof actual = %d\n", ndof);
if (ndof < ndof_allowed) { // ndof was 454 when this test was created (04-05-2011).
printf("Success!\n");
return ERROR_SUCCESS;
}
else {
printf("Failure!\n");
return ERROR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh u_mesh, v_mesh;
H2DReader mloader;
mloader.load("crack.mesh", &u_mesh);
// Perform initial uniform mesh refinement.
for (int i=0; i < INIT_REF_NUM; i++) u_mesh.refine_all_elements();
// Create initial mesh for the vertical displacement component.
// This also initializes the multimesh hp-FEM.
v_mesh.copy(&u_mesh);
// Create H1 spaces with default shapesets.
H1Space u_space(&u_mesh, bc_types_xy, essential_bc_values, P_INIT);
H1Space v_space(MULTI ? &v_mesh : &u_mesh, bc_types_xy, essential_bc_values, P_INIT);
// Initialize the weak formulation.
WeakForm wf(2);
wf.add_matrix_form(0, 0, callback(bilinear_form_0_0), HERMES_SYM);
wf.add_matrix_form(0, 1, callback(bilinear_form_0_1), HERMES_SYM);
wf.add_matrix_form(1, 1, callback(bilinear_form_1_1), HERMES_SYM);
wf.add_vector_form_surf(1, linear_form_surf_1, linear_form_surf_1_ord, BDY_TOP);
// Initialize coarse and reference mesh solutions.
Solution u_sln, v_sln, u_ref_sln, v_ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_est, graph_cpu_est;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Tuple<Space *>* ref_spaces = construct_refined_spaces(Tuple<Space *>(&u_space, &v_space));
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, *ref_spaces, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solutions.
if(solver->solve()) Solution::vector_to_solutions(solver->get_solution(), *ref_spaces,
Tuple<Solution *>(&u_ref_sln, &v_ref_sln));
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(Tuple<Space *>(&u_space, &v_space), Tuple<Solution *>(&u_ref_sln, &v_ref_sln),
Tuple<Solution *>(&u_sln, &v_sln), matrix_solver);
// Calculate element errors.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(Tuple<Space *>(&u_space, &v_space), Tuple<ProjNormType>(HERMES_H1_NORM, HERMES_H1_NORM));
adaptivity->set_error_form(0, 0, bilinear_form_0_0<scalar, scalar>, bilinear_form_0_0<Ord, Ord>);
adaptivity->set_error_form(0, 1, bilinear_form_0_1<scalar, scalar>, bilinear_form_0_1<Ord, Ord>);
adaptivity->set_error_form(1, 0, bilinear_form_1_0<scalar, scalar>, bilinear_form_1_0<Ord, Ord>);
adaptivity->set_error_form(1, 1, bilinear_form_1_1<scalar, scalar>, bilinear_form_1_1<Ord, Ord>);
// Calculate error estimate for each solution component and the total error estimate.
Tuple<double> err_est_rel;
bool solutions_for_adapt = true;
double err_est_rel_total = adaptivity->calc_err_est(Tuple<Solution *>(&u_sln, &v_sln), Tuple<Solution *>(&u_ref_sln, &v_ref_sln), solutions_for_adapt,
HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_ABS, &err_est_rel) * 100;
// Time measurement.
cpu_time.tick();
// Report results.
info("ndof_coarse[0]: %d, ndof_fine[0]: %d, err_est_rel[0]: %g%%",
u_space.Space::get_num_dofs(), (*ref_spaces)[0]->Space::get_num_dofs(), err_est_rel[0]*100);
info("ndof_coarse[1]: %d, ndof_fine[1]: %d, err_est_rel[1]: %g%%",
v_space.Space::get_num_dofs(), (*ref_spaces)[1]->Space::get_num_dofs(), err_est_rel[1]*100);
info("ndof_coarse_total: %d, ndof_fine_total: %d, err_est_rel_total: %g%%",
Space::get_num_dofs(Tuple<Space *>(&u_space, &v_space)), Space::get_num_dofs(*ref_spaces), err_est_rel_total);
// Add entry to DOF and CPU convergence graphs.
graph_dof_est.add_values(Space::get_num_dofs(Tuple<Space *>(&u_space, &v_space)), err_est_rel_total);
graph_dof_est.save("conv_dof_est.dat");
graph_cpu_est.add_values(cpu_time.accumulated(), err_est_rel_total);
graph_cpu_est.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel_total < ERR_STOP)
done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(Tuple<RefinementSelectors::Selector *>(&selector, &selector),
MULTI ? THRESHOLD_MULTI:THRESHOLD_SINGLE, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(Tuple<Space *>(&u_space, &v_space)) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false)
for(int i = 0; i < ref_spaces->size(); i++)
delete (*ref_spaces)[i]->get_mesh();
delete ref_spaces;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(Tuple<Space *>(&u_space, &v_space));
int ndof_allowed = 920;
printf("ndof actual = %d\n", ndof);
printf("ndof allowed = %d\n", ndof_allowed);
if (ndof <= ndof_allowed) { // ndofs was 908 at the time this test was created
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("domain.mesh", &mesh);
// Perform initial mesh refinements.
mesh.refine_all_elements();
// Initialize boundary conditions.
CustomEssentialBCNonConst bc_essential(BDY_HORIZONTAL);
EssentialBCs bcs(&bc_essential);
// Create an H1 space with default shapeset.
H1Space space(&mesh, &bcs, P_INIT);
int ndof = space.get_num_dofs();
info("ndof = %d", ndof);
// Initialize the weak formulation.
CustomWeakFormGeneral wf;
// Initialize coarse and reference mesh solution.
Solution sln, ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Initialize views.
ScalarView sview("Solution", new WinGeom(0, 0, 440, 350));
sview.show_mesh(false);
OrderView oview("Polynomial orders", new WinGeom(450, 0, 400, 350));
// DOF and CPU convergence graphs initialization.
SimpleGraph graph_dof, graph_cpu;
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = Space::construct_refined_space(&space);
// Initialize matrix solver.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Assemble reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solution.
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// View the coarse mesh solution and polynomial orders.
sview.show(&sln);
oview.show(&space);
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
Adapt* adaptivity = new Adapt(&space);
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space), err_est_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
// If err_est_rel too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if (done == false)
delete ref_space->get_mesh();
delete ref_space;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
// Show the reference solution - the final result.
sview.set_title("Fine mesh solution");
sview.show(&ref_sln);
// Wait for all views to be closed.
View::wait();
return 0;
}
int main(int argc, char* argv[])
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Load the mesh.
Mesh u1_mesh, u2_mesh;
H2DReader mloader;
mloader.load("../bracket.mesh", &u1_mesh);
// Initial mesh refinements.
u1_mesh.refine_element_id(1);
u1_mesh.refine_element_id(4);
// Create initial mesh for the vertical displacement component.
// This also initializes the multimesh hp-FEM.
u2_mesh.copy(&u1_mesh);
// Initialize boundary conditions.
DefaultEssentialBCConst zero_disp(BDY_RIGHT, 0.0);
EssentialBCs bcs(&zero_disp);
// Create x- and y- displacement space using the default H1 shapeset.
H1Space u1_space(&u1_mesh, &bcs, P_INIT);
H1Space u2_space(&u2_mesh, &bcs, P_INIT);
info("ndof = %d.", Space::get_num_dofs(Hermes::vector<Space *>(&u1_space, &u2_space)));
// Initialize the weak formulation.
CustomWeakForm wf(E, nu, rho*g1, BDY_TOP, f0, f1);
// Initialize the FE problem.
bool is_linear = true;
DiscreteProblem dp(&wf, Hermes::vector<Space *>(&u1_space, &u2_space), is_linear);
// Initialize coarse and reference mesh solutions.
Solution u1_sln, u2_sln, u1_ref_sln, u2_ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Initialize views.
//ScalarView s_view_0("Solution (x-displacement)", new WinGeom(0, 0, 400, 350));
//s_view_0.show_mesh(false);
//ScalarView s_view_1("Solution (y-displacement)", new WinGeom(760, 0, 400, 350));
//s_view_1.show_mesh(false);
//OrderView o_view_0("Mesh (x-displacement)", new WinGeom(410, 0, 340, 350));
//OrderView o_view_1("Mesh (y-displacement)", new WinGeom(1170, 0, 340, 350));
//ScalarView mises_view("Von Mises stress [Pa]", new WinGeom(0, 405, 400, 350));
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_est, graph_cpu_est;
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Hermes::vector<Space *>* ref_spaces = Space::construct_refined_spaces(Hermes::vector<Space *>(&u1_space, &u2_space));
// Initialize matrix solver.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, *ref_spaces, is_linear);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solutions.
if(solver->solve()) Solution::vector_to_solutions(solver->get_solution(), *ref_spaces,
Hermes::vector<Solution *>(&u1_ref_sln, &u2_ref_sln));
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(Hermes::vector<Space *>(&u1_space, &u2_space),
Hermes::vector<Solution *>(&u1_ref_sln, &u2_ref_sln),
Hermes::vector<Solution *>(&u1_sln, &u2_sln), matrix_solver);
// View the coarse mesh solution and polynomial orders.
//s_view_0.show(&u1_sln);
//o_view_0.show(&u1_space);
//s_view_1.show(&u2_sln);
//o_view_1.show(&u2_space);
// For von Mises stress Filter.
//double lambda = (E * nu) / ((1 + nu) * (1 - 2*nu));
//double mu = E / (2*(1 + nu));
//VonMisesFilter stress(Hermes::vector<MeshFunction *>(&u1_sln, &u2_sln), lambda, mu);
//mises_view.show(&stress, HERMES_EPS_HIGH, H2D_FN_VAL_0, &u1_sln, &u2_sln, 1e4);
// Skip visualization time.
cpu_time.tick(HERMES_SKIP);
// Initialize adaptivity.
Adapt* adaptivity = new Adapt(Hermes::vector<Space *>(&u1_space, &u2_space));
/*
// Register custom forms for error calculation.
adaptivity->set_error_form(0, 0, bilinear_form_0_0<scalar, scalar>, bilinear_form_0_0<Ord, Ord>);
adaptivity->set_error_form(0, 1, bilinear_form_0_1<scalar, scalar>, bilinear_form_0_1<Ord, Ord>);
adaptivity->set_error_form(1, 0, bilinear_form_1_0<scalar, scalar>, bilinear_form_1_0<Ord, Ord>);
adaptivity->set_error_form(1, 1, bilinear_form_1_1<scalar, scalar>, bilinear_form_1_1<Ord, Ord>);
*/
// Calculate error estimate for each solution component and the total error estimate.
info("Calculating error estimate and exact error.");
Hermes::vector<double> err_est_rel;
double err_est_rel_total = adaptivity->calc_err_est(Hermes::vector<Solution *>(&u1_sln, &u2_sln),
Hermes::vector<Solution *>(&u1_ref_sln, &u2_ref_sln), &err_est_rel) * 100;
// Time measurement.
cpu_time.tick();
// Report results.
info("ndof_coarse[0]: %d, ndof_fine[0]: %d, err_est_rel[0]: %g%%",
u1_space.Space::get_num_dofs(), Space::get_num_dofs((*ref_spaces)[0]), err_est_rel[0]*100);
info("ndof_coarse[1]: %d, ndof_fine[1]: %d, err_est_rel[1]: %g%%",
u2_space.Space::get_num_dofs(), Space::get_num_dofs((*ref_spaces)[1]), err_est_rel[1]*100);
info("ndof_coarse_total: %d, ndof_fine_total: %d, err_est_rel_total: %g%%",
Space::get_num_dofs(Hermes::vector<Space *>(&u1_space, &u2_space)),
Space::get_num_dofs(*ref_spaces), err_est_rel_total);
// Add entry to DOF and CPU convergence graphs.
graph_dof_est.add_values(Space::get_num_dofs(Hermes::vector<Space *>(&u1_space, &u2_space)),
err_est_rel_total);
graph_dof_est.save("conv_dof_est.dat");
graph_cpu_est.add_values(cpu_time.accumulated(), err_est_rel_total);
graph_cpu_est.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel_total < ERR_STOP)
done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(Hermes::vector<RefinementSelectors::Selector *>(&selector, &selector),
THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(Hermes::vector<Space *>(&u1_space, &u2_space)) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false)
for(unsigned int i = 0; i < ref_spaces->size(); i++)
delete (*ref_spaces)[i]->get_mesh();
delete ref_spaces;
delete dp;
// Increase counter.
as++;
}
while (done == false);
int ndof = Space::get_num_dofs(Hermes::vector<Space *>(&u1_space, &u2_space));
int ndof_allowed = 1420;
printf("ndof actual = %d\n", ndof);
printf("ndof allowed = %d\n", ndof_allowed);
if (ndof <= ndof_allowed) { // ndofs was 1414 at the time this test was created
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Instantiate a class with global functions.
Hermes2D hermes2d;
// Load the mesh.
Mesh u_mesh, v_mesh;
H2DReader mloader;
mloader.load("../square.mesh", &u_mesh);
if (MULTI == false) u_mesh.refine_towards_boundary("Outer", INIT_REF_BDY);
// Create initial mesh (master mesh).
v_mesh.copy(&u_mesh);
// Initial mesh refinements in the v_mesh towards the boundary.
if (MULTI == true) v_mesh.refine_towards_boundary("Outer", INIT_REF_BDY);
// Set exact solutions.
ExactSolutionFitzHughNagumo1 exact_u(&u_mesh);
ExactSolutionFitzHughNagumo2 exact_v(&v_mesh, K);
// Define right-hand sides.
CustomRightHandSide1 rhs_1(K, D_u, SIGMA);
CustomRightHandSide2 rhs_2(K, D_v);
// Initialize the weak formulation.
WeakFormFitzHughNagumo wf(&rhs_1, &rhs_2);
// Initialize boundary conditions
DefaultEssentialBCConst bc_u("Outer", 0.0);
EssentialBCs bcs_u(&bc_u);
DefaultEssentialBCConst bc_v("Outer", 0.0);
EssentialBCs bcs_v(&bc_v);
// Create H1 spaces with default shapeset for both displacement components.
H1Space u_space(&u_mesh, &bcs_u, P_INIT_U);
H1Space v_space(MULTI ? &v_mesh : &u_mesh, &bcs_v, P_INIT_V);
// Initialize coarse and reference mesh solutions.
Solution u_sln, v_sln, u_ref_sln, v_ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_est, graph_cpu_est,
graph_dof_exact, graph_cpu_exact;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Hermes::vector<Space *>* ref_spaces =
Space::construct_refined_spaces(Hermes::vector<Space *>(&u_space, &v_space));
int ndof_ref = Space::get_num_dofs(Hermes::vector<Space *>(&u_space, &v_space));
// Initialize matrix solver.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Initialize reference problem.
info("Solving on reference mesh.");
DiscreteProblem* dp = new DiscreteProblem(&wf, *ref_spaces);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Initial coefficient vector for the Newton's method.
scalar* coeff_vec = new scalar[ndof_ref];
memset(coeff_vec, 0, ndof_ref * sizeof(scalar));
// Perform Newton's iteration.
if (!hermes2d.solve_newton(coeff_vec, dp, solver, matrix, rhs)) error("Newton's iteration failed.");
// Translate the resulting coefficient vector into the Solution sln.
Solution::vector_to_solutions(coeff_vec, *ref_spaces, Hermes::vector<Solution *>(&u_ref_sln, &v_ref_sln));
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(Hermes::vector<Space *>(&u_space, &v_space), Hermes::vector<Solution *>(&u_ref_sln, &v_ref_sln),
Hermes::vector<Solution *>(&u_sln, &v_sln), matrix_solver);
// Calculate element errors.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(Hermes::vector<Space *>(&u_space, &v_space));
// Calculate error estimate for each solution component and the total error estimate.
Hermes::vector<double> err_est_rel;
double err_est_rel_total = adaptivity->calc_err_est(Hermes::vector<Solution *>(&u_sln, &v_sln),
Hermes::vector<Solution *>(&u_ref_sln, &v_ref_sln), &err_est_rel) * 100;
// Calculate exact error for each solution component and the total exact error.
Hermes::vector<double> err_exact_rel;
bool solutions_for_adapt = false;
double err_exact_rel_total = adaptivity->calc_err_exact(Hermes::vector<Solution *>(&u_sln, &v_sln),
Hermes::vector<Solution *>(&exact_u, &exact_v),
&err_exact_rel, solutions_for_adapt) * 100;
// Time measurement.
cpu_time.tick();
// Report results.
info("ndof_coarse[0]: %d, ndof_fine[0]: %d",
u_space.Space::get_num_dofs(), (*ref_spaces)[0]->Space::get_num_dofs());
info("err_est_rel[0]: %g%%, err_exact_rel[0]: %g%%", err_est_rel[0]*100, err_exact_rel[0]*100);
info("ndof_coarse[1]: %d, ndof_fine[1]: %d",
v_space.Space::get_num_dofs(), (*ref_spaces)[1]->Space::get_num_dofs());
info("err_est_rel[1]: %g%%, err_exact_rel[1]: %g%%", err_est_rel[1]*100, err_exact_rel[1]*100);
info("ndof_coarse_total: %d, ndof_fine_total: %d",
Space::get_num_dofs(Hermes::vector<Space *>(&u_space, &v_space)), Space::get_num_dofs(*ref_spaces));
info("err_est_rel_total: %g%%, err_est_exact_total: %g%%", err_est_rel_total, err_exact_rel_total);
// Add entry to DOF and CPU convergence graphs.
graph_dof_est.add_values(Space::get_num_dofs(Hermes::vector<Space *>(&u_space, &v_space)), err_est_rel_total);
graph_dof_est.save("conv_dof_est.dat");
graph_cpu_est.add_values(cpu_time.accumulated(), err_est_rel_total);
graph_cpu_est.save("conv_cpu_est.dat");
graph_dof_exact.add_values(Space::get_num_dofs(Hermes::vector<Space *>(&u_space, &v_space)), err_exact_rel_total);
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel_total);
graph_cpu_exact.save("conv_cpu_exact.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel_total < ERR_STOP)
done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(Hermes::vector<RefinementSelectors::Selector *>(&selector, &selector),
THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(Hermes::vector<Space *>(&u_space, &v_space)) >= NDOF_STOP) done = true;
// Clean up.
delete [] coeff_vec;
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false)
for(unsigned int i = 0; i < ref_spaces->size(); i++)
delete (*ref_spaces)[i]->get_mesh();
delete ref_spaces;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(Hermes::vector<Space *>(&u_space, &v_space));
printf("ndof allowed = %d\n", 580);
printf("ndof actual = %d\n", ndof);
if (ndof < 580) { // ndofs was 574 at the time this test was created
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh u_mesh, v_mesh;
H2DReader mloader;
mloader.load("square.mesh", &u_mesh);
if (MULTI == false) u_mesh.refine_towards_boundary(1, INIT_REF_BDY);
// Create initial mesh (master mesh).
v_mesh.copy(&u_mesh);
// Initial mesh refinements in the v_mesh towards the boundary.
if (MULTI == true) v_mesh.refine_towards_boundary(1, INIT_REF_BDY);
// Enter boundary markers.
BCTypes bc_types;
bc_types.add_bc_dirichlet(OUTER_BDY);
// Enter Dirichlet boundary values.
BCValues bc_values;
bc_values.add_zero(OUTER_BDY);
// Create H1 spaces with default shapeset for both displacement components.
H1Space u_space(&u_mesh, &bc_types, &bc_values, P_INIT_U);
H1Space v_space(MULTI ? &v_mesh : &u_mesh, &bc_types, &bc_values, P_INIT_V);
// Initialize the weak formulation.
WeakForm wf(2);
wf.add_matrix_form(0, 0, callback(bilinear_form_0_0));
wf.add_matrix_form(0, 1, callback(bilinear_form_0_1));
wf.add_matrix_form(1, 0, callback(bilinear_form_1_0));
wf.add_matrix_form(1, 1, callback(bilinear_form_1_1));
wf.add_vector_form(0, linear_form_0, linear_form_0_ord);
wf.add_vector_form(1, linear_form_1, linear_form_1_ord);
// Initialize coarse and reference mesh solutions.
Solution u_sln, v_sln, u_ref_sln, v_ref_sln;
// Initialize exact solutions.
ExactSolution u_exact(&u_mesh, uexact);
ExactSolution v_exact(&v_mesh, vexact);
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_est, graph_cpu_est,
graph_dof_exact, graph_cpu_exact;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Hermes::Tuple<Space *>* ref_spaces = construct_refined_spaces(Hermes::Tuple<Space *>(&u_space, &v_space));
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, *ref_spaces, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solutions.
if(solver->solve()) Solution::vector_to_solutions(solver->get_solution(), *ref_spaces,
Hermes::Tuple<Solution *>(&u_ref_sln, &v_ref_sln));
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(Hermes::Tuple<Space *>(&u_space, &v_space), Hermes::Tuple<Solution *>(&u_ref_sln, &v_ref_sln),
Hermes::Tuple<Solution *>(&u_sln, &v_sln), matrix_solver);
// Calculate element errors.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(Hermes::Tuple<Space *>(&u_space, &v_space), Hermes::Tuple<ProjNormType>(HERMES_H1_NORM, HERMES_H1_NORM));
// Calculate error estimate for each solution component and the total error estimate.
Hermes::Tuple<double> err_est_rel;
bool solutions_for_adapt = true;
double err_est_rel_total = adaptivity->calc_err_est(Hermes::Tuple<Solution *>(&u_sln, &v_sln), Hermes::Tuple<Solution *>(&u_ref_sln, &v_ref_sln), solutions_for_adapt,
HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_ABS, &err_est_rel) * 100;
// Calculate exact error for each solution component and the total exact error.
Hermes::Tuple<double> err_exact_rel;
solutions_for_adapt = false;
double err_exact_rel_total = adaptivity->calc_err_exact(Hermes::Tuple<Solution *>(&u_sln, &v_sln), Hermes::Tuple<Solution *>(&u_exact, &v_exact), solutions_for_adapt,
HERMES_TOTAL_ERROR_REL, &err_exact_rel) * 100;
// Time measurement.
cpu_time.tick();
// Report results.
info("ndof_coarse[0]: %d, ndof_fine[0]: %d",
u_space.Space::get_num_dofs(), (*ref_spaces)[0]->Space::get_num_dofs());
info("err_est_rel[0]: %g%%, err_exact_rel[0]: %g%%", err_est_rel[0]*100, err_exact_rel[0]*100);
info("ndof_coarse[1]: %d, ndof_fine[1]: %d",
v_space.Space::get_num_dofs(), (*ref_spaces)[1]->Space::get_num_dofs());
info("err_est_rel[1]: %g%%, err_exact_rel[1]: %g%%", err_est_rel[1]*100, err_exact_rel[1]*100);
info("ndof_coarse_total: %d, ndof_fine_total: %d",
Space::get_num_dofs(Hermes::Tuple<Space *>(&u_space, &v_space)), Space::get_num_dofs(*ref_spaces));
info("err_est_rel_total: %g%%, err_est_exact_total: %g%%", err_est_rel_total, err_exact_rel_total);
// Add entry to DOF and CPU convergence graphs.
graph_dof_est.add_values(Space::get_num_dofs(Hermes::Tuple<Space *>(&u_space, &v_space)), err_est_rel_total);
graph_dof_est.save("conv_dof_est.dat");
graph_cpu_est.add_values(cpu_time.accumulated(), err_est_rel_total);
graph_cpu_est.save("conv_cpu_est.dat");
graph_dof_exact.add_values(Space::get_num_dofs(Hermes::Tuple<Space *>(&u_space, &v_space)), err_exact_rel_total);
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel_total);
graph_cpu_exact.save("conv_cpu_exact.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel_total < ERR_STOP)
done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(Hermes::Tuple<RefinementSelectors::Selector *>(&selector, &selector),
THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(Hermes::Tuple<Space *>(&u_space, &v_space)) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false)
for(unsigned int i = 0; i < ref_spaces->size(); i++)
delete (*ref_spaces)[i]->get_mesh();
delete ref_spaces;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(Hermes::Tuple<Space *>(&u_space, &v_space));
printf("ndof allowed = %d\n", 1040);
printf("ndof actual = %d\n", ndof);
if (ndof < 1040) { // ndofs was 1030 at the time this test was created
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
int main()
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Create coarse mesh, set Dirichlet BC, enumerate basis functions.
Space* space = new Space(A, B, NELEM, DIR_BC_LEFT, DIR_BC_RIGHT, P_INIT, NEQ);
// Enumerate basis functions, info for user.
int ndof = Space::get_num_dofs(space);
info("ndof: %d", ndof);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(jacobian);
wf.add_vector_form(residual);
double elem_errors[MAX_ELEM_NUM]; // This array decides what
// elements will be refined.
ElemPtr2 ref_elem_pairs[MAX_ELEM_NUM]; // To store element pairs from the
// FTR solution. Decides how
// elements will be hp-refined.
for (int i=0; i < MAX_ELEM_NUM; i++)
{
ref_elem_pairs[i][0] = new Element();
ref_elem_pairs[i][1] = new Element();
}
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_exact, graph_cpu_exact;
/// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem *dp_coarse = new DiscreteProblem(&wf, space, is_linear);
// Newton's loop on coarse mesh.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec_coarse = new double[Space::get_num_dofs(space)];
get_coeff_vector(space, coeff_vec_coarse);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix_coarse = create_matrix(matrix_solver);
Vector* rhs_coarse = create_vector(matrix_solver);
Solver* solver_coarse = create_linear_solver(matrix_solver, matrix_coarse, rhs_coarse);
int it = 1;
while (1)
{
// Obtain the number of degrees of freedom.
int ndof_coarse = Space::get_num_dofs(space);
// Assemble the Jacobian matrix and residual vector.
dp_coarse->assemble(coeff_vec_coarse, matrix_coarse, rhs_coarse);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs_coarse);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL_COARSE && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i<ndof_coarse; i++) rhs_coarse->set(i, -rhs_coarse->get(i));
// Solve the linear system.
if(!solver_coarse->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof_coarse; i++) coeff_vec_coarse[i] += solver_coarse->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec_coarse, space);
it++;
}
// Cleanup.
delete matrix_coarse;
delete rhs_coarse;
delete solver_coarse;
delete [] coeff_vec_coarse;
delete dp_coarse;
// For every element perform its fast trial refinement (FTR),
// calculate the norm of the difference between the FTR
// solution and the coarse space solution, and store the
// error in the elem_errors[] array.
int n_elem = space->get_n_active_elem();
for (int i=0; i < n_elem; i++)
{
info("=== Starting FTR of Elem [%d].", i);
// Replicate coarse space including solution.
Space *space_ref_local = space->replicate();
// Perform FTR of element 'i'
space_ref_local->reference_refinement(i, 1);
info("Elem [%d]: fine space created (%d DOF).",
i, space_ref_local->assign_dofs());
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem* dp = new DiscreteProblem(&wf, space_ref_local, is_linear);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Newton's loop on the FTR space.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec = new double[Space::get_num_dofs(space_ref_local)];
get_coeff_vector(space_ref_local, coeff_vec);
memset(coeff_vec, 0, Space::get_num_dofs(space_ref_local)*sizeof(double));
int it = 1;
while (1)
{
// Obtain the number of degrees of freedom.
int ndof = Space::get_num_dofs(space_ref_local);
// Assemble the Jacobian matrix and residual vector.
dp->assemble(coeff_vec, matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space_ref_local), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL_REF && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i<ndof; i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!solver->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof; i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec, space_ref_local);
it++;
}
// Cleanup.
delete matrix;
delete rhs;
delete solver;
delete dp;
delete [] coeff_vec;
// Print FTR solution (enumerated).
Linearizer *lxx = new Linearizer(space_ref_local);
char out_filename[255];
sprintf(out_filename, "solution_ref_%d.gp", i);
lxx->plot_solution(out_filename);
delete lxx;
// Calculate norm of the difference between the coarse space
// and FTR solutions.
// NOTE: later we want to look at the difference in some quantity
// of interest rather than error in global norm.
double err_est_array[MAX_ELEM_NUM];
elem_errors[i] = calc_err_est(NORM, space, space_ref_local, err_est_array) * 100;
info("Elem [%d]: absolute error (est) = %g%%", i, elem_errors[i]);
// Copy the reference element pair for element 'i'.
// into the ref_elem_pairs[i][] array
Iterator *I = new Iterator(space);
Iterator *I_ref = new Iterator(space_ref_local);
Element *e, *e_ref;
while (1)
{
e = I->next_active_element();
e_ref = I_ref->next_active_element();
if (e->id == i)
{
e_ref->copy_into(ref_elem_pairs[e->id][0]);
// coarse element 'e' was split in space.
if (e->level != e_ref->level)
{
e_ref = I_ref->next_active_element();
e_ref->copy_into(ref_elem_pairs[e->id][1]);
}
break;
}
}
delete I;
delete I_ref;
delete space_ref_local;
}
// Time measurement.
cpu_time.tick();
// If exact solution available, also calculate exact error.
if (EXACT_SOL_PROVIDED)
{
// Calculate element errors wrt. exact solution.
double err_exact_rel = calc_err_exact(NORM, space, exact_sol, NEQ, A, B) * 100;
// Info for user.
info("Relative error (exact) = %g %%", err_exact_rel);
// Add entry to DOF and CPU convergence graphs.
graph_dof_exact.add_values(Space::get_num_dofs(space), err_exact_rel);
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel);
}
// Calculate max FTR error.
double max_ftr_error = 0;
for (int i=0; i < space->get_n_active_elem(); i++)
{
if (elem_errors[i] > max_ftr_error) max_ftr_error = elem_errors[i];
}
info("Max FTR error = %g%%.", max_ftr_error);
// Decide whether the max. FTR error is sufficiently small.
if(max_ftr_error < TOL_ERR_FTR) break;
// debug
//if (as >= 1) break;
// Returns updated coarse space with the last solution on it.
adapt(NORM, ADAPT_TYPE, THRESHOLD, elem_errors, space, ref_elem_pairs);
// Plot spaces, results, and errors.
adapt_plotting(space, ref_elem_pairs, NORM, EXACT_SOL_PROVIDED, exact_sol);
as++;
}
while (done == false);
info("Total running time: %g s", cpu_time.accumulated());
// Save convergence graphs.
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.save("conv_cpu_exact.dat");
// Test variable.
bool success = true;
info("ndof = %d.", Space::get_num_dofs(space));
if (Space::get_num_dofs(space) > 35) success = false;
if (success)
{
info("Success!");
return ERROR_SUCCESS;
}
else
{
info("Failure!");
return ERROR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh mesh, basemesh;
H2DReader mloader;
mloader.load("GAMM-channel.mesh", &basemesh);
// Perform initial mesh refinements.
for (int i = 0; i < INIT_REF_NUM; i++) basemesh.refine_all_elements();
basemesh.refine_by_criterion(criterion, 4);
mesh.copy(&basemesh);
// Enter boundary markers.
BCTypes bc_types;
bc_types.add_bc_neumann(Hermes::Tuple<int>(BDY_SOLID_WALL, BDY_INLET_OUTLET));
// Create L2 spaces with default shapesets.
L2Space space_rho(&mesh, &bc_types, P_INIT);
L2Space space_rho_v_x(&mesh, &bc_types, P_INIT);
L2Space space_rho_v_y(&mesh, &bc_types, P_INIT);
L2Space space_e(&mesh, &bc_types, P_INIT);
// Initialize solutions, set initial conditions.
Solution sln_rho, sln_rho_v_x, sln_rho_v_y, sln_e, prev_rho, prev_rho_v_x, prev_rho_v_y, prev_e;
Solution rsln_rho, rsln_rho_v_x, rsln_rho_v_y, rsln_e;
sln_rho.set_exact(&mesh, ic_density);
sln_rho_v_x.set_exact(&mesh, ic_density_vel_x);
sln_rho_v_y.set_exact(&mesh, ic_density_vel_y);
sln_e.set_exact(&mesh, ic_energy);
prev_rho.set_exact(&mesh, ic_density);
prev_rho_v_x.set_exact(&mesh, ic_density_vel_x);
prev_rho_v_y.set_exact(&mesh, ic_density_vel_y);
prev_e.set_exact(&mesh, ic_energy);
// Initialize weak formulation.
WeakForm wf(4);
// Bilinear forms coming from time discretization by explicit Euler's method.
wf.add_matrix_form(0,0,callback(bilinear_form_0_0_time));
wf.add_matrix_form(1,1,callback(bilinear_form_1_1_time));
wf.add_matrix_form(2,2,callback(bilinear_form_2_2_time));
wf.add_matrix_form(3,3,callback(bilinear_form_3_3_time));
// Volumetric linear forms.
// Linear forms coming from the linearization by taking the Eulerian fluxes' Jacobian matrices from the previous time step.
// First flux.
/*
wf.add_vector_form(0,callback(linear_form_0_1), HERMES_ANY, Hermes::Tuple<MeshFunction*>(&prev_rho_v_x));
wf.add_vector_form(1, callback(linear_form_1_0_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_1_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_2_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_3_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(2, callback(linear_form_2_0_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(2, callback(linear_form_2_1_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(2, callback(linear_form_2_2_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(2, callback(linear_form_2_3_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_0_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_1_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_2_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_3_first_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
// Second flux.
wf.add_vector_form(0,callback(linear_form_0_2),HERMES_ANY, Hermes::Tuple<MeshFunction*>(&prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_0_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_1_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_2_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(1, callback(linear_form_1_3_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(2, callback(linear_form_2_0_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(2, callback(linear_form_2_1_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(2, callback(linear_form_2_2_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y));
wf.add_vector_form(2, callback(linear_form_2_3_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_0_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_1_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_2_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, callback(linear_form_3_3_second_flux), HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
*/
// Volumetric linear forms coming from the time discretization.
#ifdef HERMES_USE_VECTOR_VALUED_FORMS
wf.add_vector_form(0, linear_form_vector, linear_form_order, HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(1, linear_form_vector, linear_form_order, HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(2, linear_form_vector, linear_form_order, HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form(3, linear_form_vector, linear_form_order, HERMES_ANY,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#else
wf.add_vector_form(0,linear_form, linear_form_order, HERMES_ANY, &prev_rho);
wf.add_vector_form(1,linear_form, linear_form_order, HERMES_ANY, &prev_rho_v_x);
wf.add_vector_form(2,linear_form, linear_form_order, HERMES_ANY, &prev_rho_v_y);
wf.add_vector_form(3,linear_form, linear_form_order, HERMES_ANY, &prev_e);
#endif
// Surface linear forms - inner edges coming from the DG formulation.
#ifdef HERMES_USE_VECTOR_VALUED_FORMS
wf.add_vector_form_surf(0, linear_form_interface_vector, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(1, linear_form_interface_vector, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(2, linear_form_interface_vector, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(3, linear_form_interface_vector, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#else
wf.add_vector_form_surf(0, linear_form_interface_0, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(1, linear_form_interface_1, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(2, linear_form_interface_2, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(3, linear_form_interface_3, linear_form_order, H2D_DG_INNER_EDGE,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#endif
// Surface linear forms - inlet / outlet edges.
#ifdef HERMES_USE_VECTOR_VALUED_FORMS
wf.add_vector_form_surf(0, bdy_flux_inlet_outlet_comp_vector, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(1, bdy_flux_inlet_outlet_comp_vector, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(2, bdy_flux_inlet_outlet_comp_vector, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(3, bdy_flux_inlet_outlet_comp_vector, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#else
wf.add_vector_form_surf(0, bdy_flux_inlet_outlet_comp_0, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(1, bdy_flux_inlet_outlet_comp_1, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(2, bdy_flux_inlet_outlet_comp_2, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(3, bdy_flux_inlet_outlet_comp_3, linear_form_order, BDY_INLET_OUTLET,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#endif
// Surface linear forms - Solid wall edges.
#ifdef HERMES_USE_VECTOR_VALUED_FORMS
wf.add_vector_form_surf(0, bdy_flux_solid_wall_comp_vector, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(1, bdy_flux_solid_wall_comp_vector, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(2, bdy_flux_solid_wall_comp_vector, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(3, bdy_flux_solid_wall_comp_vector, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#else
wf.add_vector_form_surf(0, bdy_flux_solid_wall_comp_0, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(1, bdy_flux_solid_wall_comp_1, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(2, bdy_flux_solid_wall_comp_2, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
wf.add_vector_form_surf(3, bdy_flux_solid_wall_comp_3, linear_form_order, BDY_SOLID_WALL,
Hermes::Tuple<MeshFunction*>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e));
#endif
// Filters for visualization of pressure and the two components of velocity.
SimpleFilter pressure(calc_pressure_func, Hermes::Tuple<MeshFunction*>(&sln_rho, &sln_rho_v_x, &sln_rho_v_y, &sln_e));
SimpleFilter u(calc_u_func, Hermes::Tuple<MeshFunction*>(&sln_rho, &sln_rho_v_x, &sln_rho_v_y, &sln_e));
SimpleFilter w(calc_w_func, Hermes::Tuple<MeshFunction*>(&sln_rho, &sln_rho_v_x, &sln_rho_v_y, &sln_e));
// Initialize refinement selector.
L2ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Disable weighting of refinement candidates.
selector.set_error_weights(1, 1, 1);
//VectorView vview("Velocity", new WinGeom(0, 0, 600, 300));
//ScalarView sview("Pressure", new WinGeom(700, 0, 600, 300));
ScalarView s1("w1", new WinGeom(0, 0, 620, 300));
s1.fix_scale_width(80);
ScalarView s2("w2", new WinGeom(625, 0, 600, 300));
s2.fix_scale_width(50);
ScalarView s3("w3", new WinGeom(0, 350, 620, 300));
s3.fix_scale_width(80);
ScalarView s4("w4", new WinGeom(625, 350, 600, 300));
s4.fix_scale_width(50);
// Iteration number.
int iteration = 0;
// For calculation of the time derivative of the norm of the solution approximation.
// Not used yet in the adaptive version.
double difference;
double *difference_values = new double[Space::get_num_dofs(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e))];
double *last_values = new double[Space::get_num_dofs(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e))];
for(int i = 0; i < Space::get_num_dofs(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e)); i++)
last_values[i] = 0.;
// Output of the approximate time derivative.
// Not used yet in the adaptive version.
std::ofstream time_der_out("time_der");
for(t = 0.0; t < 10; t += TAU)
{
info("---- Time step %d, time %3.5f.", iteration, t);
iteration++;
// Periodic global derefinements.
if (iteration > 1 && iteration % UNREF_FREQ == 0 && REFINEMENT_COUNT > 0) {
REFINEMENT_COUNT = 0;
info("Global mesh derefinement.");
mesh.unrefine_all_elements();
space_rho.set_uniform_order(P_INIT);
space_rho_v_x.set_uniform_order(P_INIT);
space_rho_v_y.set_uniform_order(P_INIT);
space_e.set_uniform_order(P_INIT);
}
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
// Global polynomial order increase = 0;
int order_increase = 0;
Hermes::Tuple<Space *>* ref_spaces = construct_refined_spaces(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e), order_increase);
// Project the previous time level solution onto the new fine mesh.
info("Projecting the previous time level solution onto the new fine mesh.");
OGProjection::project_global(*ref_spaces, Hermes::Tuple<Solution *>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e),
Hermes::Tuple<Solution *>(&prev_rho, &prev_rho_v_x, &prev_rho_v_y, &prev_e), matrix_solver,
Hermes::Tuple<ProjNormType>(HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM));
if(as > 1) {
delete rsln_rho.get_mesh();
delete rsln_rho_v_x.get_mesh();
delete rsln_rho_v_y.get_mesh();
delete rsln_e.get_mesh();
}
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, *ref_spaces, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// The FE problem is in fact a FV problem.
dp->set_fvm();
#ifdef HERMES_USE_VECTOR_VALUED_FORMS
dp->use_vector_valued_forms();
#endif
dp->assemble(matrix, rhs);
// Solve the linear system of the reference problem. If successful, obtain the solutions.
if(solver->solve()) Solution::vector_to_solutions(solver->get_solution(), *ref_spaces,
Hermes::Tuple<Solution *>(&rsln_rho, &rsln_rho_v_x, &rsln_rho_v_y, &rsln_e));
else error ("Matrix solver failed.\n");
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e), Hermes::Tuple<Solution *>(&rsln_rho, &rsln_rho_v_x, &rsln_rho_v_y, &rsln_e),
Hermes::Tuple<Solution *>(&sln_rho, &sln_rho_v_x, &sln_rho_v_y, &sln_e), matrix_solver,
Hermes::Tuple<ProjNormType>(HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM));
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
Adapt* adaptivity = new Adapt(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e), Hermes::Tuple<ProjNormType>(HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM));
bool solutions_for_adapt = true;
// Error components.
Hermes::Tuple<double> *error_components = new Hermes::Tuple<double>(4);
double err_est_rel_total = adaptivity->calc_err_est(Hermes::Tuple<Solution *>(&sln_rho, &sln_rho_v_x, &sln_rho_v_y, &sln_e),
Hermes::Tuple<Solution *>(&rsln_rho, &rsln_rho_v_x, &rsln_rho_v_y, &rsln_e), solutions_for_adapt,
HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_ABS, error_components) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e)), Space::get_num_dofs(*ref_spaces), err_est_rel_total);
// Determine the time step.
double *solution_vector = new double[Space::get_num_dofs(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e))];
OGProjection::project_global(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e), Hermes::Tuple<MeshFunction *>(&sln_rho, &sln_rho_v_x, &sln_rho_v_y, &sln_e), solution_vector, matrix_solver,
Hermes::Tuple<ProjNormType>(HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM, HERMES_L2_NORM));
double min_condition = 0;
Element *e;
for (int _id = 0, _max = mesh.get_max_element_id(); _id < _max; _id++) \
if (((e) = mesh.get_element_fast(_id))->used) \
if ((e)->active)
{
AsmList al;
space_rho.get_element_assembly_list(e, &al);
double rho = solution_vector[al.dof[0]];
space_rho_v_x.get_element_assembly_list(e, &al);
double v1 = solution_vector[al.dof[0]] / rho;
space_rho_v_y.get_element_assembly_list(e, &al);
double v2 = solution_vector[al.dof[0]] / rho;
space_e.get_element_assembly_list(e, &al);
double energy = solution_vector[al.dof[0]];
double condition = e->get_area() / (std::sqrt(v1*v1 + v2*v2) + calc_sound_speed(rho, rho*v1, rho*v2, energy));
if(condition < min_condition || min_condition == 0.)
min_condition = condition;
}
if(TAU > min_condition)
TAU = min_condition;
if(TAU < min_condition * 0.9)
TAU = min_condition;
delete [] solution_vector;
// Visualization.
s1.show(&sln_rho);
s2.show(&sln_rho_v_x);
s3.show(&sln_rho_v_y);
s4.show(&sln_e);
// If err_est too large, adapt the mesh.
if (err_est_rel_total < ERR_STOP && (*error_components)[1] * 100 < ERR_STOP_VEL_X)
done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(Hermes::Tuple<RefinementSelectors::Selector *>(&selector, &selector, &selector, &selector),
THRESHOLD, STRATEGY, MESH_REGULARITY);
REFINEMENT_COUNT++;
if (Space::get_num_dofs(Hermes::Tuple<Space *>(&space_rho, &space_rho_v_x,
&space_rho_v_y, &space_e)) >= NDOF_STOP)
done = true;
else
// Increase the counter of performed adaptivity steps.
as++;
}
// We have to empty the cache of NeighborSearch class instances.
NeighborSearch::empty_main_caches();
// If used, we need to clean the vector valued form caches.
#ifdef HERMES_USE_VECTOR_VALUED_FORMS
DiscreteProblem::empty_form_caches();
#endif
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
for(unsigned int i = 0; i < ref_spaces->size(); i++)
delete (*ref_spaces)[i];
delete dp;
}
while (done == false);
// Debugging.
/*
std::ofstream out("matrix");
for(int i = 0; i < matrix->get_size(); i++)
for(int j = 0; j < matrix->get_size(); j++)
if(std::abs(matrix->get(i,j)) != 0)
out << '(' << i << ',' << j << ')' << ':' << matrix->get(i,j) << std::endl;
out.close();
out.open("rhs");
for(int j = 0; j < matrix->get_size(); j++)
if(std::abs(rhs->get(j)) != 0)
out << '(' << j << ')' << ':' << rhs->get(j) << std::endl;
out.close();
out.open("sol");
for(int j = 0; j < matrix->get_size(); j++)
out << '(' << j << ')' << ':' << solver->get_solution()[j] << std::endl;
out.close();
*/
// Copy the solutions into the previous time level ones.
prev_rho.copy(&rsln_rho);
prev_rho_v_x.copy(&rsln_rho_v_x);
prev_rho_v_y.copy(&rsln_rho_v_y);
prev_e.copy(&rsln_e);
delete rsln_rho.get_mesh();
delete rsln_rho_v_x.get_mesh();
delete rsln_rho_v_y.get_mesh();
delete rsln_e.get_mesh();
// Visualization.
/*
pressure.reinit();
u.reinit();
w.reinit();
sview.show(&pressure);
vview.show(&u,&w);
*/
}
time_der_out.close();
return 0;
}
int main()
{
// Create space, set Dirichlet BC, enumerate basis functions.
Space* space = new Space(A, B, NELEM, DIR_BC_LEFT, DIR_BC_RIGHT, P_INIT, NEQ);
int ndof = Space::get_num_dofs(space);
info("ndof: %d", ndof);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(jacobian);
wf.add_vector_form(residual);
// Initialize the FE problem.
DiscreteProblem *dp = new DiscreteProblem(&wf, space);
// Allocate coefficient vector.
double *coeff_vec = new double[ndof];
memset(coeff_vec, 0, ndof*sizeof(double));
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Time stepping loop.
double current_time = 0.0;
while (current_time < T_FINAL)
{
// Newton's loop.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
get_coeff_vector(space, coeff_vec);
int it = 1;
while (true)
{
// Assemble the Jacobian matrix and residual vector.
dp->assemble(coeff_vec, matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i<ndof; i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!solver->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof; i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec, space);
it++;
}
// Plot the solution.
Linearizer l(space);
char filename[100];
sprintf(filename, "solution_%g.gp", current_time);
l.plot_solution(filename);
info("Solution %s written.", filename);
current_time += TAU;
}
// Plot the resulting space.
space->plot("space.gp");
// Cleaning
delete dp;
delete rhs;
delete solver;
delete[] coeff_vec;
delete space;
delete matrix;
info("Done.");
return 0;
}
int main(int argc, char* argv[])
{
// Instantiate a class with global functions.
Hermes2D hermes2d;
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("../square_quad.mesh", &mesh);
// Perform initial mesh refinement.
for (int i=0; i < INIT_REF_NUM; i++) mesh.refine_all_elements();
// Set exact solution.
CustomExactSolution exact(&mesh, ALPHA);
// Define right-hand side.
CustomRightHandSide rhs(ALPHA);
// Initialize the weak formulation.
CustomWeakForm wf(&rhs);
// Initialize boundary conditions
DefaultEssentialBCNonConst bc(BDY_DIRICHLET, &exact);
EssentialBCs bcs(&bc);
// Create an H1 space with default shapeset.
H1Space space(&mesh, &bcs, P_INIT);
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs.
SimpleGraph graph_dof, graph_cpu, graph_dof_exact, graph_cpu_exact;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = Space::construct_refined_space(&space);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
// Assemble the reference problem.
info("Solving on reference mesh.");
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solution.
Solution ref_sln;
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
Solution sln;
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// Calculate element errors and total error estimate.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(&space);
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln) * 100;
// Calculate exact error.
double err_exact_rel = hermes2d.calc_rel_error(&sln, &exact, HERMES_H1_NORM) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d", Space::get_num_dofs(&space), Space::get_num_dofs(ref_space));
info("err_est_rel: %g%%, err_exact_rel: %g%%", err_est_rel, err_exact_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
graph_dof_exact.add_values(Space::get_num_dofs(&space), err_exact_rel);
graph_dof_exact.save("conv_dof_exact.dat");
graph_cpu_exact.add_values(cpu_time.accumulated(), err_exact_rel);
graph_cpu_exact.save("conv_cpu_exact.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
// Increase the counter of performed adaptivity steps.
if (done == false) as++;
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false) delete ref_space->get_mesh();
delete ref_space;
delete dp;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(&space);
int n_dof_allowed = 270;
printf("n_dof_actual = %d\n", ndof);
printf("n_dof_allowed = %d\n", n_dof_allowed);
if (ndof <= n_dof_allowed) {
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Load the mesh.
Mesh xmesh, ymesh, tmesh;
H2DReader mloader;
mloader.load("domain.mesh", &xmesh); // Master mesh.
// Initialize multimesh hp-FEM.
ymesh.copy(&xmesh); // Ydisp will share master mesh with xdisp.
tmesh.copy(&xmesh); // Temp will share master mesh with xdisp.
// Enter boundary markers.
BCTypes bc_types_x_y;
bc_types_x_y.add_bc_dirichlet(BDY_BOTTOM);
bc_types_x_y.add_bc_neumann(Hermes::Tuple<int>(BDY_SIDES, BDY_TOP, BDY_HOLES));
BCTypes bc_types_t;
bc_types_t.add_bc_dirichlet(BDY_HOLES);
bc_types_t.add_bc_neumann(Hermes::Tuple<int>(BDY_SIDES, BDY_TOP, BDY_BOTTOM));
// Enter Dirichlet boundary values.
BCValues bc_values_x_y;
bc_values_x_y.add_zero(BDY_BOTTOM);
BCValues bc_values_t;
bc_values_t.add_const(BDY_HOLES, TEMP_INNER);
// Create H1 spaces with default shapesets.
H1Space xdisp(&xmesh, &bc_types_x_y, &bc_values_x_y, P_INIT_DISP);
H1Space ydisp(MULTI ? &ymesh : &xmesh, &bc_types_x_y, &bc_values_x_y, P_INIT_DISP);
H1Space temp(MULTI ? &tmesh : &xmesh, &bc_types_t, &bc_values_t, P_INIT_TEMP);
// Initialize the weak formulation.
WeakForm wf(3);
wf.add_matrix_form(0, 0, callback(bilinear_form_0_0));
wf.add_matrix_form(0, 1, callback(bilinear_form_0_1), HERMES_SYM);
wf.add_matrix_form(0, 2, callback(bilinear_form_0_2));
wf.add_matrix_form(1, 1, callback(bilinear_form_1_1));
wf.add_matrix_form(1, 2, callback(bilinear_form_1_2));
wf.add_matrix_form(2, 2, callback(bilinear_form_2_2));
wf.add_vector_form(1, callback(linear_form_1));
wf.add_vector_form(2, callback(linear_form_2));
wf.add_vector_form_surf(2, callback(linear_form_surf_2));
// Initialize coarse and reference mesh solutions.
Solution xdisp_sln, ydisp_sln, temp_sln, ref_xdisp_sln, ref_ydisp_sln, ref_temp_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// Initialize views.
ScalarView s_view_0("Solution[xdisp]", new WinGeom(0, 0, 450, 350));
s_view_0.show_mesh(false);
ScalarView s_view_1("Solution[ydisp]", new WinGeom(460, 0, 450, 350));
s_view_1.show_mesh(false);
ScalarView s_view_2("Solution[temp]", new WinGeom(920, 0, 450, 350));
s_view_1.show_mesh(false);
OrderView o_view_0("Mesh[xdisp]", new WinGeom(0, 360, 450, 350));
OrderView o_view_1("Mesh[ydisp]", new WinGeom(460, 360, 450, 350));
OrderView o_view_2("Mesh[temp]", new WinGeom(920, 360, 450, 350));
// DOF and CPU convergence graphs.
SimpleGraph graph_dof_est, graph_cpu_est;
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Hermes::Tuple<Space *>* ref_spaces = construct_refined_spaces(Hermes::Tuple<Space *>(&xdisp, &ydisp, &temp));
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, *ref_spaces, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solutions.
if(solver->solve()) Solution::vector_to_solutions(solver->get_solution(), *ref_spaces,
Hermes::Tuple<Solution *>(&ref_xdisp_sln, &ref_ydisp_sln, &ref_temp_sln));
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(Hermes::Tuple<Space *>(&xdisp, &ydisp, &temp), Hermes::Tuple<Solution *>(&ref_xdisp_sln, &ref_ydisp_sln, &ref_temp_sln),
Hermes::Tuple<Solution *>(&xdisp_sln, &ydisp_sln, &temp_sln), matrix_solver);
// View the coarse mesh solution and polynomial orders.
s_view_0.show(&xdisp_sln);
o_view_0.show(&xdisp);
s_view_1.show(&ydisp_sln);
o_view_1.show(&ydisp);
s_view_2.show(&temp_sln);
o_view_2.show(&temp);
// Skip visualization time.
cpu_time.tick(HERMES_SKIP);
// Calculate element errors.
info("Calculating error estimate and exact error.");
Adapt* adaptivity = new Adapt(Hermes::Tuple<Space *>(&xdisp, &ydisp, &temp),
Hermes::Tuple<ProjNormType>(HERMES_H1_NORM, HERMES_H1_NORM, HERMES_H1_NORM));
adaptivity->set_error_form(0, 0, bilinear_form_0_0<scalar, scalar>, bilinear_form_0_0<Ord, Ord>);
adaptivity->set_error_form(0, 1, bilinear_form_0_1<scalar, scalar>, bilinear_form_0_1<Ord, Ord>);
adaptivity->set_error_form(0, 2, bilinear_form_0_2<scalar, scalar>, bilinear_form_0_2<Ord, Ord>);
adaptivity->set_error_form(1, 0, bilinear_form_1_0<scalar, scalar>, bilinear_form_1_0<Ord, Ord>);
adaptivity->set_error_form(1, 1, bilinear_form_1_1<scalar, scalar>, bilinear_form_1_1<Ord, Ord>);
adaptivity->set_error_form(1, 2, bilinear_form_1_2<scalar, scalar>, bilinear_form_1_2<Ord, Ord>);
adaptivity->set_error_form(2, 2, bilinear_form_2_2<scalar, scalar>, bilinear_form_2_2<Ord, Ord>);
// Calculate error estimate for each solution component and the total error estimate.
Hermes::Tuple<double> err_est_rel;
bool solutions_for_adapt = true;
double err_est_rel_total = adaptivity->calc_err_est(Hermes::Tuple<Solution *>(&xdisp_sln, &ydisp_sln, &temp_sln),
Hermes::Tuple<Solution *>(&ref_xdisp_sln, &ref_ydisp_sln, &ref_temp_sln), solutions_for_adapt,
HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_ABS, &err_est_rel) * 100;
// Time measurement.
cpu_time.tick();
// Report results.
info("ndof_coarse[xdisp]: %d, ndof_fine[xdisp]: %d, err_est_rel[xdisp]: %g%%",
xdisp.Space::get_num_dofs(), Space::get_num_dofs((*ref_spaces)[0]), err_est_rel[0]*100);
info("ndof_coarse[ydisp]: %d, ndof_fine[ydisp]: %d, err_est_rel[ydisp]: %g%%",
ydisp.Space::get_num_dofs(), Space::get_num_dofs((*ref_spaces)[1]), err_est_rel[1]*100);
info("ndof_coarse[temp]: %d, ndof_fine[temp]: %d, err_est_rel[temp]: %g%%",
temp.Space::get_num_dofs(), Space::get_num_dofs((*ref_spaces)[2]), err_est_rel[2]*100);
info("ndof_coarse_total: %d, ndof_fine_total: %d, err_est_rel_total: %g%%",
Space::get_num_dofs(Hermes::Tuple<Space *>(&xdisp, &ydisp, &temp)), Space::get_num_dofs(*ref_spaces), err_est_rel_total);
// Add entry to DOF and CPU convergence graphs.
graph_dof_est.add_values(Space::get_num_dofs(Hermes::Tuple<Space *>(&xdisp, &ydisp, &temp)), err_est_rel_total);
graph_dof_est.save("conv_dof_est.dat");
graph_cpu_est.add_values(cpu_time.accumulated(), err_est_rel_total);
graph_cpu_est.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel_total < ERR_STOP)
done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(Hermes::Tuple<RefinementSelectors::Selector *>(&selector, &selector, &selector),
THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(Hermes::Tuple<Space *>(&xdisp, &ydisp, &temp)) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false)
for(unsigned int i = 0; i < ref_spaces->size(); i++)
delete (*ref_spaces)[i]->get_mesh();
delete ref_spaces;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
// Show the reference solution - the final result.
s_view_0.set_title("Fine mesh Solution[xdisp]");
s_view_0.show(&ref_xdisp_sln);
s_view_1.set_title("Fine mesh Solution[ydisp]");
s_view_1.show(&ref_ydisp_sln);
s_view_1.set_title("Fine mesh Solution[temp]");
s_view_1.show(&ref_temp_sln);
// Wait for all views to be closed.
View::wait();
return 0;
};
int main(int argc, char* argv[])
{
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("domain2.mesh", &mesh);
// Perform initial mesh refinements.
for (int i=0; i<INIT_REF_NUM; i++) mesh.refine_all_elements();
// Enter boundary markers.
BCTypes bc_types;
bc_types.add_bc_dirichlet(Hermes::vector<int>(BDY_RIGHT, BDY_TOP, BDY_LEFT));
bc_types.add_bc_neumann(BDY_BUTTOM);
// Create an H1 space with default shapeset.
H1Space space(&mesh, &bc_types, essential_bc_values, P_INIT);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(callback(bilinear_form_iron), HERMES_SYM, 3);
wf.add_matrix_form(callback(bilinear_form_wire), HERMES_SYM, 2);
wf.add_matrix_form(callback(bilinear_form_air), HERMES_SYM, 1);
wf.add_vector_form(callback(linear_form_wire), 2);
// Initialize coarse and reference mesh solution.
Solution sln, ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs initialization.
SimpleGraph graph_dof, graph_cpu;
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = construct_refined_space(&space);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
if (matrix_solver == SOLVER_AZTECOO) {
((AztecOOSolver*) solver)->set_solver(iterative_method);
((AztecOOSolver*) solver)->set_precond(preconditioner);
// Using default iteration parameters (see solver/aztecoo.h).
}
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem. If successful, obtain the solution.
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Time measurement.
cpu_time.tick();
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
Adapt* adaptivity = new Adapt(&space);
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space), err_est_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if (done == false)
delete ref_space->get_mesh();
delete ref_space;
delete dp;
// Increase counter.
as++;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(&space);
#define ERROR_SUCCESS 0
#define ERROR_FAILURE -1
printf("ndof allowed = %d\n", 650);
printf("ndof actual = %d\n", ndof);
if (ndof < 650) { // ndofs was 625 atthe time this test was created
printf("Success!\n");
return ERROR_SUCCESS;
}
else {
printf("Failure!\n");
return ERROR_FAILURE;
}
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh mesh;
H2DReader mloader;
mloader.load("square_quad.mesh", &mesh); // quadrilaterals
// mloader.load("square_tri.mesh", &mesh); // triangles
// Perform initial mesh refinement.
for (int i=0; i<INIT_REF_NUM; i++) mesh.refine_all_elements();
mesh.refine_towards_boundary(BDY_LAYER, INIT_REF_NUM_BDY);
// Enter boundary markers.
BCTypes bc_types;
bc_types.add_bc_dirichlet(Hermes::Tuple<int>(BDY_LAYER, BDY_REST));
// Enter Dirichlet boundary values.
BCValues bc_values;
bc_values.add_function(BDY_LAYER, essential_bc_values);
bc_values.add_const(BDY_REST, 1.0);
// Create an H1 space with default shapeset.
H1Space space(&mesh, &bc_types, &bc_values, P_INIT);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(callback(bilinear_form));
if (STABILIZATION_ON == true) {
wf.add_matrix_form(callback(bilinear_form_stabilization));
}
if (SHOCK_CAPTURING_ON == true) {
wf.add_matrix_form(callback(bilinear_form_shock_capturing));
}
// Initialize coarse and reference mesh solution.
Solution sln, ref_sln;
// Initialize refinement selector.
H1ProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs initialization.
SimpleGraph graph_dof, graph_cpu;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = construct_refined_space(&space);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem.
// If successful, obtain the solution.
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
Adapt* adaptivity = new Adapt(&space, HERMES_H1_NORM);
bool solutions_for_adapt = true;
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln, solutions_for_adapt, HERMES_TOTAL_ERROR_REL | HERMES_ELEMENT_ERROR_REL) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space), err_est_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
// Increase the counter of performed adaptivity steps.
if (done == false) as++;
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false) delete ref_space->get_mesh();
delete ref_space;
delete dp;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(&space);
int n_dof_allowed = 570;
printf("n_dof_actual = %d\n", ndof);
printf("n_dof_allowed = %d\n", n_dof_allowed);// ndofs was 558 at the time this test was created
if (ndof <= n_dof_allowed) {
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
int main() {
// Create space, set Dirichlet BC, enumerate basis functions.
Space* space = new Space(A, B, NELEM, DIR_BC_LEFT, DIR_BC_RIGHT, P_INIT, NEQ);
info("N_dof = %d.", Space::get_num_dofs(space));
// Initialize the weak formulation.
WeakForm wf(4);
wf.add_matrix_form(0, 0, jacobian_1_1);
wf.add_matrix_form(0, 1, jacobian_1_2);
wf.add_matrix_form(1, 0, jacobian_2_1);
wf.add_matrix_form(1, 1, jacobian_2_2);
wf.add_matrix_form(1, 2, jacobian_2_3);
wf.add_matrix_form(2, 1, jacobian_3_2);
wf.add_matrix_form(2, 2, jacobian_3_3);
wf.add_matrix_form(2, 3, jacobian_3_4);
wf.add_matrix_form(3, 2, jacobian_4_3);
wf.add_matrix_form(3, 3, jacobian_4_4);
wf.add_vector_form(0, residual_1);
wf.add_vector_form(1, residual_2);
wf.add_vector_form(2, residual_3);
wf.add_vector_form(3, residual_4);
// Initialize the FE problem.
bool is_linear = false;
DiscreteProblem *dp = new DiscreteProblem(&wf, space, is_linear);
// Newton's loop.
// Fill vector coeff_vec using dof and coeffs arrays in elements.
double *coeff_vec = new double[Space::get_num_dofs(space)];
get_coeff_vector(space, coeff_vec);
// Set up the solver, matrix, and rhs according to the solver selection.
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
int it = 1;
while (1) {
// Obtain the number of degrees of freedom.
int ndof = Space::get_num_dofs(space);
// Assemble the Jacobian matrix and residual vector.
dp->assemble(matrix, rhs);
// Calculate the l2-norm of residual vector.
double res_l2_norm = get_l2_norm(rhs);
// Info for user.
info("---- Newton iter %d, ndof %d, res. l2 norm %g", it, Space::get_num_dofs(space), res_l2_norm);
// If l2 norm of the residual vector is within tolerance, then quit.
// NOTE: at least one full iteration forced
// here because sometimes the initial
// residual on fine mesh is too small.
if(res_l2_norm < NEWTON_TOL && it > 1) break;
// Multiply the residual vector with -1 since the matrix
// equation reads J(Y^n) \deltaY^{n+1} = -F(Y^n).
for(int i=0; i<ndof; i++) rhs->set(i, -rhs->get(i));
// Solve the linear system.
if(!solver->solve())
error ("Matrix solver failed.\n");
// Add \deltaY^{n+1} to Y^n.
for (int i = 0; i < ndof; i++) coeff_vec[i] += solver->get_solution()[i];
// If the maximum number of iteration has been reached, then quit.
if (it >= NEWTON_MAX_ITER) error ("Newton method did not converge.");
// Copy coefficients from vector y to elements.
set_coeff_vector(coeff_vec, space);
it++;
}
// Plot the solution.
Linearizer l(space);
l.plot_solution("solution.gp");
// Plot the resulting space.
space->plot("space.gp");
info("Done.");
return 0;
}
int main(int argc, char* argv[])
{
// Load the mesh.
Mesh mesh;
H2DReader mloader;
if (ALIGN_MESH) mloader.load("oven_load_circle.mesh", &mesh);
else mloader.load("oven_load_square.mesh", &mesh);
// Perform initial mesh refinemets.
for (int i=0; i < INIT_REF_NUM; i++) mesh.refine_all_elements();
// Enter boundary markers.
BCTypes bc_types;
bc_types.add_bc_dirichlet(BDY_DIRICHLET);
bc_types.add_bc_neumann(BDY_NEUMANN);
// Enter Dirichlet boundary values.
BCValues bc_values;
bc_values.add_zero(BDY_DIRICHLET);
// Create an Hcurl space.
HcurlSpace space(&mesh, &bc_types, &bc_values, P_INIT);
// Initialize the weak formulation.
WeakForm wf;
wf.add_matrix_form(callback(bilinear_form));
wf.add_vector_form_surf(callback(linear_form_surf));
// Initialize coarse and reference mesh solution.
Solution sln, ref_sln;
// Initialize refinements selector.
HcurlProjBasedSelector selector(CAND_LIST, CONV_EXP, H2DRS_DEFAULT_ORDER);
// DOF and CPU convergence graphs initialization.
SimpleGraph graph_dof, graph_cpu;
// Time measurement.
TimePeriod cpu_time;
cpu_time.tick();
// Adaptivity loop:
int as = 1;
bool done = false;
do
{
info("---- Adaptivity step %d:", as);
// Construct globally refined reference mesh and setup reference space.
Space* ref_space = construct_refined_space(&space);
// Assemble the reference problem.
info("Solving on reference mesh.");
bool is_linear = true;
DiscreteProblem* dp = new DiscreteProblem(&wf, ref_space, is_linear);
SparseMatrix* matrix = create_matrix(matrix_solver);
Vector* rhs = create_vector(matrix_solver);
Solver* solver = create_linear_solver(matrix_solver, matrix, rhs);
dp->assemble(matrix, rhs);
// Time measurement.
cpu_time.tick();
// Solve the linear system of the reference problem.
// If successful, obtain the solution.
if(solver->solve()) Solution::vector_to_solution(solver->get_solution(), ref_space, &ref_sln);
else error ("Matrix solver failed.\n");
// Project the fine mesh solution onto the coarse mesh.
info("Projecting reference solution on coarse mesh.");
OGProjection::project_global(&space, &ref_sln, &sln, matrix_solver);
// Time measurement.
cpu_time.tick();
// Calculate element errors and total error estimate.
info("Calculating error estimate.");
Adapt* adaptivity = new Adapt(&space);
double err_est_rel = adaptivity->calc_err_est(&sln, &ref_sln) * 100;
// Report results.
info("ndof_coarse: %d, ndof_fine: %d, err_est_rel: %g%%",
Space::get_num_dofs(&space), Space::get_num_dofs(ref_space), err_est_rel);
// Time measurement.
cpu_time.tick();
// Add entry to DOF and CPU convergence graphs.
graph_dof.add_values(Space::get_num_dofs(&space), err_est_rel);
graph_dof.save("conv_dof_est.dat");
graph_cpu.add_values(cpu_time.accumulated(), err_est_rel);
graph_cpu.save("conv_cpu_est.dat");
// If err_est too large, adapt the mesh.
if (err_est_rel < ERR_STOP) done = true;
else
{
info("Adapting coarse mesh.");
done = adaptivity->adapt(&selector, THRESHOLD, STRATEGY, MESH_REGULARITY);
// Increase the counter of performed adaptivity steps.
if (done == false) as++;
}
if (Space::get_num_dofs(&space) >= NDOF_STOP) done = true;
// Clean up.
delete solver;
delete matrix;
delete rhs;
delete adaptivity;
if(done == false) delete ref_space->get_mesh();
delete ref_space;
delete dp;
}
while (done == false);
verbose("Total running time: %g s", cpu_time.accumulated());
int ndof = Space::get_num_dofs(&space);
int n_dof_allowed = 1230;
printf("n_dof_actual = %d\n", ndof); // was 1218 at the time this test was last revisited
printf("n_dof_allowed = %d\n", n_dof_allowed);
if (ndof <= n_dof_allowed) {
printf("Success!\n");
return ERR_SUCCESS;
}
else {
printf("Failure!\n");
return ERR_FAILURE;
}
}
