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Added support for constant cells inside the grid.

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Max Luebke 2022-02-03 15:07:49 +01:00
parent 54d1a396f4
commit e3d10336a9
1 changed files with 7 additions and 0 deletions
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7
src/BTCSDiffusion.cpp
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@ -134,6 +134,13 @@ void BTCSDiffusion::simulate1D(std::vector<double> &c, boundary_condition left,
// A_matrix.insert(size + 1, size + 1) = 1;
for (int i = 1; i < size - right_is_constant; i++) {
if (bc[i + !(left_is_constant)].type == BTCSDiffusion::BC_CONSTANT) {
A_matrix.insert(i,i) = 1;
b_vector[i] = bc[i + !(left_is_constant)].value;
continue;
}
double sx = (alpha[i + !(left_is_constant)] * time_step) / (dx * dx);
A_matrix.insert(i, i) = -1. - 2. * sx;