vcbferreira/NuFI_deal.ii
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field history added

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This commit is contained in:
Vasco C. B. Ferreira
2026-06-29 11:41:20 +02:00
parent 77392e4731
commit 9f6cca2aa2
7 changed files with 38 additions and 276 deletions
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src/nufi_solver.cc
+18 -15
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@@ -6,7 +6,7 @@
#include <cstdlib>
#include <deal.II/base/point.h>
#include <deal.II/base/tensor.h>
#include <deal.II/numerics/fe_field_function.h>
#include <deal.II/numerics/vector_tools.h>
#include <cstddef>
#include <iostream>
@@ -74,7 +74,7 @@ NuFISolver::eval_f(unsigned int n, double x, double u,
return f0(x, u);
}
double NuFISolver::eval_rho(const unsigned int n, const double x,
double NuFISolver::eval_rho(unsigned int n, const double x,
const PoissonProblem<1> &poisson,
const std::vector<Vector<double>> &phi_history,
const unsigned int Nv) const {
@@ -84,14 +84,9 @@ double NuFISolver::eval_rho(const unsigned int n, const double x,
double integral = 0.0;
if (n == 0) {
for (unsigned int i = 0; i < Nv; ++i)
integral += f0(x, v_min + i * dv);
} else {
#pragma omp parallel for reduction(+ : integral)
for (unsigned int i = 0; i < Nv; ++i)
integral += eval_ftilda(n, x, v_min + i * dv, poisson, phi_history);
}
for (unsigned int i = 0; i < Nv; ++i)
integral += eval_ftilda(n, x, v_min + i * dv, poisson, phi_history);
return 1.0 - integral * dv;
}
@@ -115,6 +110,10 @@ void NuFISolver::run() {
double total_time = 0;
std::ofstream time_file("results/simulation_time.txt");
time_file << "# it step_time total_time" << "\n";
const double x_min = Parameters::X_DOMAIN_LEFT;
double dx = Parameters::CALC_DX;
for (unsigned int it = 0; it < Nt; ++it) {
stopwatch<double> timer;
@@ -127,8 +126,6 @@ void NuFISolver::run() {
// compute rho
double dx = Parameters::CALC_DX;
#pragma omp parallel for
for (size_t i = 0; i < Nx; i++) {
double x = Parameters::X_DOMAIN_LEFT + i * dx;
@@ -138,8 +135,13 @@ void NuFISolver::run() {
rho.get()[i] = ith_rho;
}
poisson.set_rhs_function(
std::make_unique<ChargeDensity_NuFI<1>>(rho.get(), Nx));
poisson.set_rhs_function([&rho, x_min, dx, Nx = Nx](const Point<1> &p) {
double x = p[0];
int i = static_cast<int>(std::floor((x - x_min) / dx));
i = (i % Nx + Nx) % Nx;
return rho.get()[i];
});
poisson.solve_step();
phi_history.push_back(poisson.get_solution());
@@ -151,6 +153,8 @@ void NuFISolver::run() {
double step_time = timer_elapsed - time_elapsed_before;
total_time += timer_elapsed;
time_file << it << " " << step_time << " " << total_time << "\n";
std::cout << "step made in " << step_time << " seconds\n\n";
if (it % Parameters::PLOT_FREQUENCY == 0) {
std::cout << "Saving results... ";
@@ -164,8 +168,7 @@ void NuFISolver::run() {
std::vector<double> E_x(Nx, 0.0);
#pragma omp parallel for
for (size_t ix = 0; ix < Nx; ++ix) {
E_x[ix] = -eval(Parameters::X_DOMAIN_LEFT + ix * dx, poisson,
phi_history[it]);
E_x[ix] = -eval(x_min + ix * dx, poisson, phi_history[it]);
}
save_space_vector(E_x, "field", it);