72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
#include "tug/BoundaryCondition.hpp"
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#include <tug/Diffusion.hpp>
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#include <iostream>
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#include <fstream>
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#include <string>
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using namespace std;
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using namespace tug::diffusion;
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using namespace tug::bc;
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int main(int argc, char *argv[]) {
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// define problem dimensionality
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// set grid sizes for each dimension
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int dim = 1;
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int n = 20;
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vector<double> alpha(n, 1e-1);
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// double alpha = 1e-1;
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vector<double> field(n, 1e-6);
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for (int i = 1; i<20; i++) {
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field[i] = 0;
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}
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// double field = 1e-6;
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TugGrid grid_param; // why is grid_param defined separately?
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// grid_param.grid_cells[0] = 20;
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// grid_param.grid_cells[1] = 0;
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// grid_param.grid_cells[2] = 0;
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// grid_param.domain_size[0] = 20;
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// grid_param.domain_size[1] = 0;
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// grid_param.domain_size[2] = 0;
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TugInput input_param;
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input_param.setTimestep(1.);
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//input_param.grid = grid_param;
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input_param.setGridCellN(n);
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input_param.setDomainSize(n); // what is domain?????
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BoundaryCondition bc(n);
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input_param.setBoundaryCondition(bc);
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BoundaryCondition bc2 = input_param.getBoundaryCondition();
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auto [bc_left, bc_right] = bc2.row_boundary(0);
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cout << "left: " << unsigned(bc_left.type) << endl;
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cout << "right: " << unsigned(bc_right.type) << endl;
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ofstream myfile;
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myfile.open("output.csv");
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if (!myfile) {
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exit(1);
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}
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for (int t = 0; t < 10000; t++) {
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double result = BTCS_1D(input_param, &field[0], &alpha[0]);
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//myfile << result;
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//myfile << '\n';
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//myfile << "Vector contents: ";
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for (int i = 0; i < field.size(); i++) {
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myfile << field[i];
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if (i < field.size()-1) {
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myfile << ", ";
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}
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}
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myfile << std::endl;
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}
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myfile.close();
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} |