tug/examples/reference-FTCS_2D_closed.cpp

#include <tug/Simulation.hpp>
#include "Eigen/Core"
#include <iostream>

using namespace std;

int main(int argc, char *argv[]) {
    int row = 50;
    int col = 50;
    int domain_row = 10;
    int domain_col = 10;


    // Grid
    Grid grid = Grid(row, col);
    grid.setDomain(domain_row, domain_col);

    MatrixXd concentrations = MatrixXd::Constant(row, col, 0);
    concentrations(5,5) = 1;
    grid.setConcentrations(concentrations);

    MatrixXd alpha = MatrixXd::Constant(row, col, 1);
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 6; j++) {
            alpha(i, j) = 0.01;
        }
    }
    for (int i = 0; i < 5; i++) {
        for (int j = 6; j < 11; j++) {
            alpha(i, j) = 0.001;
        }
    }
    for (int i = 5; i < 11; i++) {
        for (int j = 6; j < 11; j++) {
            alpha(i, j) = 0.1;
        }
    }
    grid.setAlpha(alpha, alpha);


    // Boundary
    Boundary bc = Boundary(grid);


    // Simulation
    Simulation sim = Simulation(grid, bc, FTCS_APPROACH);
    sim.setTimestep(0.001);
    sim.setIterations(10000);
    sim.setOutputCSV(CSV_OUTPUT_OFF);
    sim.setOutputConsole(CONSOLE_OUTPUT_OFF);


    // RUN
    sim.run();
}