// This is a user-supplied routine that sets the the boundary conditions
//
void SetBndValues_Unst(const mesh& Mesh, dTensor3* q, dTensor3* aux)
{
int meqn = q->getsize(2);
int kmax = q->getsize(3);
int maux = aux->getsize(2);
int NumElems = Mesh.get_NumElems();
int NumPhysElems = Mesh.get_NumPhysElems();
int NumGhostElems = Mesh.get_NumGhostElems();
int NumNodes = Mesh.get_NumNodes();
int NumPhysNodes = Mesh.get_NumPhysNodes();
int NumEdges = Mesh.get_NumEdges();
// ----------------------------------------
// Loop over each ghost cell element and
// place the correct information into
// these elements
// ----------------------------------------
for (int i=1; i<=NumGhostElems; i++)
{
int j = Mesh.get_ghost_link(i);
for (int m=1; m<=meqn; m++)
for (int k=1; k<=kmax; k++)
{
q->set(i+NumPhysElems,m,k, 0.0 );
}
}
}
// This is a user-supplied routine that sets the the boundary conditions
//
// The default routine for the 4D Vlasov code is to apply zero boundary
// conditions in configuration space. This routine is identical to the one
// found in the unst branch of the 2D DoGPack code, and *should* be setting
// periodic boundary conditions.
//
void SetBndValues_Unst(const mesh& Mesh, dTensor3* q, dTensor3* aux)
{
// problem information (If this were to be pulled from DogParams, these
// numbers would NOT be correct! The reason is that each quadrature point
// was actually saved as a separate "equation")
const int meqn = q->getsize(2);
const int kmax = q->getsize(3);
const int maux = aux->getsize(2);
// Mesh information
const int NumElems = Mesh.get_NumElems();
const int NumPhysElems = Mesh.get_NumPhysElems();
const int NumGhostElems = Mesh.get_NumGhostElems();
const int NumNodes = Mesh.get_NumNodes();
const int NumPhysNodes = Mesh.get_NumPhysNodes();
const int NumEdges = Mesh.get_NumEdges();
// ----------------------------------------
// Loop over each ghost cell element and
// place the correct information into
// these elements
// ----------------------------------------
for (int i=1; i<=NumGhostElems; i++)
{
int j = Mesh.get_ghost_link(i);
for (int m=1; m<=meqn; m++)
for (int k=1; k<=kmax; k++)
{
q->set(i+NumPhysElems, m, k, q->get(j, m, k) );
}
}
}
//
// Output basic mesh information to screen
//
void ScreenOutput(const mesh& Mesh)
{
// Compute mesh quality parameters
double totalarea = Mesh.get_area_prim(1);
double maxarea = Mesh.get_area_prim(1);
double minarea = Mesh.get_area_prim(1);
for (int i=2; i<=Mesh.get_NumPhysElems(); i++)
{
double tmp = Mesh.get_area_prim(i);
totalarea = totalarea + tmp;
if (tmp < minarea)
{ minarea = tmp; }
if (tmp > maxarea)
{ maxarea = tmp; }
}
double minAngle = 180.0;
for (int i=1; i<=Mesh.get_NumPhysElems(); i++)
{
const int i1 = Mesh.get_tnode(i,1);
const int i2 = Mesh.get_tnode(i,2);
const int i3 = Mesh.get_tnode(i,3);
point v12, v23, v31;
v12.x = Mesh.get_node(i2,1) - Mesh.get_node(i1,1);
v12.y = Mesh.get_node(i2,2) - Mesh.get_node(i1,2);
v23.x = Mesh.get_node(i3,1) - Mesh.get_node(i2,1);
v23.y = Mesh.get_node(i3,2) - Mesh.get_node(i2,2);
v31.x = Mesh.get_node(i1,1) - Mesh.get_node(i3,1);
v31.y = Mesh.get_node(i1,2) - Mesh.get_node(i3,2);
double angle1 = acos((v12.x*-v31.x+v12.y*-v31.y)
/(sqrt(v12.x*v12.x+v12.y*v12.y)*sqrt(v31.x*v31.x+v31.y*v31.y)));
double angle2 = acos((v23.x*-v12.x+v23.y*-v12.y)
/(sqrt(v23.x*v23.x+v23.y*v23.y)*sqrt(v12.x*v12.x+v12.y*v12.y)));
double angle3 = acos((v31.x*-v23.x+v31.y*-v23.y)
/(sqrt(v31.x*v31.x+v31.y*v31.y)*sqrt(v23.x*v23.x+v23.y*v23.y)));
if ((angle1*180/pi) < minAngle)
{ minAngle = angle1*180/pi; }
if ((angle2*180/pi) < minAngle)
{ minAngle = angle2*180/pi; }
if ((angle3*180/pi) < minAngle)
{ minAngle = angle3*180/pi; }
}
// Output summary of results to screen
printf("\n");
printf(" SUMMARY OF RESULTS:\n");
printf(" -------------------\n");
printf(" Number of Elements: %8i\n",Mesh.get_NumElems());
printf(" Number of Physical Elements: %8i\n",Mesh.get_NumPhysElems());
printf(" Number of Ghost Elements: %8i\n",Mesh.get_NumGhostElems());
printf(" Number of Nodes: %8i\n",Mesh.get_NumNodes());
printf(" Number of Physical Nodes: %8i\n",Mesh.get_NumPhysNodes());
printf(" Number of Boundary Nodes: %8i\n",Mesh.get_NumBndNodes());
printf(" Number of Edges: %8i\n",Mesh.get_NumEdges());
printf(" Number of Boundary Edges: %8i\n",Mesh.get_NumBndEdges());
printf("\n");
printf(" Total Area Covered: %24.16e\n",totalarea);
printf(" Area Ratio: small/large: %24.16e\n",minarea/maxarea);
printf(" Angle Ratio: minAngle/60: %24.16e\n",minAngle/60.0);
printf("\n");
}
// This routine simply glues together many of the routines that are already
// written in the Poisson solver library
//
// phi( 1:SubNumPhysNodes ) is a scalar quantity.
//
// E1 ( 1:NumElems, 1:kmax2d ) is a vector quantity.
// E2 ( 1:NumElems, 1:kmax2d ) is a vector quantity.
//
// See also: ConvertEfieldOntoDGbasis
void ComputeElectricField( const double t, const mesh& Mesh, const dTensorBC5& q,
dTensor2& E1, dTensor2& E2)
{
//
const int mx = q.getsize(1); assert_eq(mx,dogParamsCart2.get_mx());
const int my = q.getsize(2); assert_eq(my,dogParamsCart2.get_my());
const int NumElems = q.getsize(3);
const int meqn = q.getsize(4);
const int kmax = q.getsize(5);
const int space_order = dogParams.get_space_order();
// unstructured parameters:
const int kmax2d = E2.getsize(2);
const int NumBndNodes = Mesh.get_NumBndNodes();
const int NumPhysNodes = Mesh.get_NumPhysNodes();
// Quick error check
if( !Mesh.get_is_submesh() )
{
printf("ERROR: mesh needs to have subfactor set to %d\n", space_order);
printf("Go to Unstructured mesh and remesh the problem\n");
exit(-1);
}
const int SubFactor = Mesh.get_SubFactor();
assert_eq( NumElems, Mesh.get_NumElems() );
// -- Step 1: Compute rho -- //
dTensor3 rho(NumElems, 1, kmax2d );
void ComputeDensity( const mesh& Mesh, const dTensorBC5& q, dTensor3& rho );
ComputeDensity( Mesh, q, rho );
// -- Step 2: Figure out how large phi needs to be
int SubNumPhysNodes = 0;
int SubNumBndNodes = 0;
switch( dogParams.get_space_order() )
{
case 1:
SubNumPhysNodes = NumPhysNodes;
SubNumBndNodes = NumBndNodes;
break;
case 2:
SubNumPhysNodes = Mesh.get_SubNumPhysNodes();
SubNumBndNodes = Mesh.get_SubNumBndNodes();
if(SubFactor!=2)
{
printf("\n");
printf(" Error: for space_order = %i, need SubFactor = %i\n",space_order,2);
printf(" SubFactor = %i\n",SubFactor);
printf("\n");
exit(1);
}
break;
case 3:
SubNumPhysNodes = Mesh.get_SubNumPhysNodes();
SubNumBndNodes = Mesh.get_SubNumBndNodes();
if(SubFactor!=3)
{
printf("\n");
printf(" Error: for space_order = %i, need SubFactor = %i\n",space_order,3);
printf(" SubFactor = %i\n",SubFactor);
printf("\n");
exit(1);
}
break;
default:
printf("\n");
printf(" ERROR in RunDogpack_unst.cpp: space_order value not supported.\n");
printf(" space_order = %i\n",space_order);
printf("\n");
exit(1);
}
// local storage:
dTensor1 rhs(SubNumPhysNodes);
dTensor1 phi(SubNumPhysNodes);
// Get Cholesky factorization matrix R
//
// TODO - this should be saved earlier in the code rather than reading
// from file every time we with to run a Poisson solve!
//
SparseCholesky R(SubNumPhysNodes);
string outputdir = dogParams.get_outputdir();
R.init(outputdir);
R.read(outputdir);
// Create right-hand side vector
void Rhs2D_unst(const int space_order,
const mesh& Mesh, const dTensor3& rhs_dg,
dTensor1& rhs);
Rhs2D_unst(space_order, Mesh, rho, rhs);
// Call Poisson solver
void PoissonSolver2D_unst(const int space_order,
const mesh& Mesh,
const SparseCholesky& R,
const dTensor1& rhs,
dTensor1& phi,
dTensor2& E1,
dTensor2& E2);
PoissonSolver2D_unst(space_order, Mesh, R, rhs, phi, E1, E2);
// Compare errors with the exact Electric field:
//
void L2Project_Unst(
const double time,
const dTensor2* vel_vec,
const int istart,
const int iend,
const int QuadOrder,
const int BasisOrder_qin,
const int BasisOrder_auxin,
const int BasisOrder_fout,
const mesh& Mesh,
const dTensor3* qin,
const dTensor3* auxin,
dTensor3* fout,
void (*Func)(const double t, const dTensor2* vel_vec, const dTensor2&,const dTensor2&,
const dTensor2&,dTensor2&));
const int sorder = dogParams.get_space_order();
dTensor3 qtmp (NumElems, 2, kmax2d ); qtmp.setall(0.);
dTensor3 auxtmp (NumElems, 0, kmax2d );
dTensor3 ExactE (NumElems, 2, kmax2d );
L2Project_Unst( t, NULL, 1, NumElems,
sorder, sorder, sorder, sorder, Mesh,
&qtmp, &auxtmp, &ExactE,
&ExactElectricField );
// Compute errors on these two:
//
double err = 0.;
for( int n=1; n <= NumElems; n++ )
for( int k=1; k <= kmax2d; k++ )
{
err += Mesh.get_area_prim(n)*pow( ExactE.get(n,1,k) - E1.get(n,k), 2 );
err += Mesh.get_area_prim(n)*pow( ExactE.get(n,2,k) - E2.get(n,k), 2 );
}
printf("error = %2.15e\n", err );
}
