vcbferreira/NuFI_deal.ii
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nufi working, dealii solves poisson, E saved as independent spline

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This commit is contained in:
Vasco C. B. Ferreira
2026-04-09 17:27:41 +02:00
parent 47a97f7a7c
commit ee8a7dbaf5
7 changed files with 36 additions and 25 deletions
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src/nufi_solver.cc
+18 -11
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@@ -26,9 +26,10 @@ double NuFISolver::eval_ftilda(unsigned int n,
const double *E_coeffs) const
{
if ( n == 0 ) return f0(x,u);
const size_t order = Parameters::SPLINE_ORDER;
const size_t stride_x = 1;
const size_t stride_t = stride_x*(Nx + Parameters::SPLINE_ORDER - 1);
const size_t stride_t = stride_x*(Nx + order - 1);
double Ex;
const double *c;
@@ -107,26 +108,32 @@ void NuFISolver::run()
std::vector<double> sampled_potential = poisson.sample_electric_potential(x_min, x_max, Nx); // Solution of FE
save_space_vector(sampled_potential, "potential", it);
// These have been tested to be equivalent
// ////////////////////////////////////////////////
std::vector<double> E_vals = grad.compute(sampled_potential); // vector grad of FE solution
save_space_vector(E_vals, "electric", it);
std::vector<double> E_vals_deal = poisson.sample_electric_field(x_min, x_max, Nx); // FE grad of soution
save_space_vector(E_vals_deal, "electricdeal", it);
// std::vector<double> E_vals = grad.compute(sampled_potential); // vector grad of FE solution
// save_space_vector(E_vals, "electric", it);
// std::vector<double> E_vals_deal = poisson.sample_electric_field(x_min, x_max, Nx); // FE grad of soution
// save_space_vector(E_vals_deal, "electricdeal", it);
// ////////////////////////////////////////////////
double* current_coeffs = coeffs.get() + it*stride_t;
interpolate<double, Parameters::SPLINE_ORDER>(current_coeffs, E_vals.data());
// interpolate and save current field
double* current_coeffs = coeffs.get() + it*stride_t;
interpolate<double, Parameters::SPLINE_ORDER>(current_coeffs, sampled_potential.data());
std::vector<double> E_x(Nx,0.0) ;
for(size_t ix=0; ix<Nx; ++ix)
{
E_x[ix] = -eval<1>(Parameters::X_DOMAIN_LEFT+ix*dx, current_coeffs);
}
if (it % Parameters::PLOT_FREQUENCY == 0)
{
std::cout << "Saving results... \n\n";
save_ftilda(*this, it, coeffs.get(), 128, 128, "results/ftilda_" + std::to_string(it) + ".dat");
save_rho(*this, it, coeffs.get(), 128, "results/rho_" + std::to_string(it) + ".dat");
save_Efield(it, coeffs.get(), 128, "results/field_" + std::to_string(it) + ".dat");
// save_Efield(it, coeffs.get(), 128, "results/field_" + std::to_string(it) + ".dat");
save_space_vector(E_x, "field", it);
double int_val = 0.5 * integral_space_vector_squared(current_coeffs);
int_E_squared.push_back(int_val);