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corrected boundary conditions error, periodicity still not working as intended

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Vasco C. B. Ferreira
2026-03-19 18:23:49 +01:00
parent 7741f13530
commit ffb1201b96
4 changed files with 41 additions and 49 deletions
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nufi/parameters.h
+9 -7
View File
@@ -15,10 +15,13 @@ namespace Parameters
constexpr double V_DOMAIN_LEFT = -10.0;
constexpr double V_DOMAIN_RIGHT = 10.0;
constexpr unsigned int NV = 1024;
constexpr unsigned int NV = 562;
constexpr unsigned int GLOBAL_REFINEMENT = 8;
constexpr unsigned int FE_DEGREE = 3;
// deal.ii options
constexpr unsigned int GLOBAL_REFINEMENT = 7;
constexpr unsigned int FE_DEGREE = 4;
constexpr unsigned int CONVERGENCE_ITERATIONS = 20000;
constexpr double CONVERGENCE_LIMIT = 1e-12;
constexpr double EPS = 0.01;
constexpr double WAVE_NR = 0.5;
@@ -26,16 +29,15 @@ namespace Parameters
// NUFI options
constexpr double DT=1./16.;
constexpr unsigned int TMAX = 10;
constexpr unsigned int TMAX = 20;
//spline options
constexpr int SPLINE_NX = 1024;
constexpr int SPLINE_NX = 562;
constexpr double SPLINE_DX = LX/SPLINE_NX;
constexpr size_t SPLINE_ORDER = 4;
//Plotting options
constexpr int PLOT_FREQUENCY = 2;
constexpr int PLOT_FREQUENCY = 5;
}
#endif
nufi/poisson_problem.h
+32 -42
View File
@@ -5,6 +5,7 @@
#include <deal.II/base/quadrature_lib.h>
#include <deal.II/base/logstream.h>
#include <deal.II/base/template_constraints.h>
#include <deal.II/base/tensor.h>
#include <deal.II/base/utilities.h>
#include <deal.II/base/index_set.h>
@@ -33,6 +34,7 @@
#include <deal.II/numerics/matrix_tools.h>
#include <deal.II/numerics/fe_field_function.h>
#include <deal.II/numerics/vector_tools_interpolate.h>
#include <memory>
#include <string>
#include <utility>
@@ -107,9 +109,6 @@ std::vector<double> PoissonProblem<dim>::sample_electric_field(
double x_min,
double x_max)
{
// const auto &dof_handler = problem.get_dof_handler();
// const auto &solution = problem.get_solution();
this -> get_solution();
this -> get_dof_handler();
@@ -146,23 +145,16 @@ void PoissonProblem<dim>::create_mesh()
Parameters::X_DOMAIN_LEFT,
Parameters::X_DOMAIN_RIGHT);
// TO CHECK:
//
// Make x-dim boundaries periodic
// Tensor<1, dim> offset;
// std::vector<GridTools::PeriodicFacePair<
// typename Triangulation<dim>::cell_iterator>> periodicity_vector;
//
// GridTools::collect_periodic_faces(triangulation,
// 0,
// 1,
// 0,
// periodicity_vector,
// offset);
//
// triangulation.add_periodicity(periodicity_vector);
//
// END CHECK
std::vector<GridTools::PeriodicFacePair<
typename Triangulation<dim>::cell_iterator>> periodic_faces;
GridTools::collect_periodic_faces(triangulation,
0, 1, // boundary IDs
0,
periodic_faces);
triangulation.add_periodicity(periodic_faces);
triangulation.refine_global(Parameters::GLOBAL_REFINEMENT);
}
@@ -173,18 +165,16 @@ void PoissonProblem<dim>::setup_system()
dof_handler.distribute_dofs(fe);
// TO CHECK:
//
// constraints.clear();
// DoFTools::make_hanging_node_constraints(dof_handler, constraints);
//
// // 'boundary' condition phi(x_0) = 0
// constraints.add_line(0);
// constraints.set_inhomogeneity(0, 0.0);
//
// constraints.close();
//
// END CHECK
constraints.clear();
DoFTools::make_hanging_node_constraints(dof_handler, constraints);
DoFTools::make_periodicity_constraints(dof_handler,
0, 1,
0,
constraints);
constraints.close();
DynamicSparsityPattern dsp(dof_handler.n_dofs());
DoFTools::make_sparsity_pattern(dof_handler, dsp, constraints);
@@ -241,11 +231,11 @@ void PoissonProblem<dim>::assemble_system()
}
cell->get_dof_indices(local_dof_indices);
// constraints.distribute_local_to_global(cell_matrix,
// cell_rhs,
// local_dof_indices,
// system_matrix,
// system_rhs);
constraints.distribute_local_to_global(cell_matrix,
cell_rhs,
local_dof_indices,
system_matrix,
system_rhs);
for (const unsigned int i : fe_values.dof_indices())
for (const unsigned int j : fe_values.dof_indices())
system_matrix.add(local_dof_indices[i],
@@ -257,10 +247,10 @@ void PoissonProblem<dim>::assemble_system()
}
std::map<types::global_dof_index, double> boundary_values;
VectorTools::interpolate_boundary_values(dof_handler,
types::boundary_id(0),
Functions::ZeroFunction<1>(),
boundary_values);
// VectorTools::interpolate_boundary_values(dof_handler,
// types::boundary_id(0),
// Functions::ZeroFunction<1>(),
// boundary_values);
MatrixTools::apply_boundary_values(boundary_values,
system_matrix,
solution,
@@ -272,7 +262,7 @@ template <int dim>
void PoissonProblem<dim>::solve()
{
SolverControl solver_control(5000, 1e-12);
SolverControl solver_control(Parameters::CONVERGENCE_ITERATIONS, Parameters::CONVERGENCE_LIMIT);
SolverCG<Vector<double>> solver(solver_control);
// PreconditionSSOR<SparseMatrix<double>> preconditioner;