double Physics::compute_mass(const mesh::Mesh& m, const_iterator u) {
double total_mass = 0.;
const double* source = reinterpret_cast<const double*>(&u[0]);
vdPackI(m.nodes(), &source[0], 2, &h_vec[0]);
process_volumes_psk( m );
for(int i=0; i<m.local_nodes(); i++)
//total_mass += m.volume(i).vol()*u[i].M;
total_mass += m.volume(i).vol()*theta_vec[i]*rho_vec[i];
return total_mass;
}
void Physics::preprocess_evaluation(double t, const mesh::Mesh& m,
const_iterator u, const_iterator udash)
{
++num_calls;
for (int i = 0; i < m.nodes(); ++i) {
assert(u[i].h == u[i].h &&
u[i].h != std::numeric_limits<double>::infinity() &&
u[i].h != -std::numeric_limits<double>::infinity()
);
assert(u[i].M == u[i].M &&
u[i].M != std::numeric_limits<double>::infinity() &&
u[i].M != -std::numeric_limits<double>::infinity()
);
}
// Copy h from solution vector to h_vec and c_vec
const double* source = reinterpret_cast<const double*>(&u[0]);
vdPackI(m.nodes(), &source[0], 2, &h_vec[0]);
// h and gradient at CV faces
shape_matrix.matvec( h_vec, h_faces );
shape_gradient_matrixX.matvec( h_vec, grad_h_faces_.x() );
shape_gradient_matrixY.matvec( h_vec, grad_h_faces_.y() );
if (dimension == 3)
shape_gradient_matrixZ.matvec( h_vec, grad_h_faces_.z() );
// determine the p-s-k values
process_volumes_psk( m );
// density at faces using shape functions
process_faces_shape( m );
// Compute psk values at faces using upwinding/limiting
process_faces_lim( m );
// compute fluxes
process_fluxes( t, m );
}