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Apply new scheme to model (only 1D)

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This commit is contained in:
Max Luebke 2022-04-20 09:55:38 +02:00
parent 777d75baa5
commit 1fb3b85b65
1 changed files with 4 additions and 4 deletions
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8
src/BTCSDiffusion.cpp
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@ -239,8 +239,8 @@ void Diffusion::BTCSDiffusion::fillMatrixFromRow(
A_matrix.insert(1, 1) = 1;
} else {
double sx = (alpha[0] * time_step) / (dx * dx);
A_matrix.insert(1, 1) = -1. - 2. * sx;
A_matrix.insert(1, 0) = sx;
A_matrix.insert(1, 1) = -1. - 3. * sx;
A_matrix.insert(1, 0) = 2.*sx;
A_matrix.insert(1, 2) = sx;
}
@ -261,9 +261,9 @@ void Diffusion::BTCSDiffusion::fillMatrixFromRow(
A_matrix.insert(A_size - 2, A_size - 2) = 1;
} else {
double sx = (alpha[size - 1] * time_step) / (dx * dx);
A_matrix.insert(A_size - 2, A_size - 2) = -1. - 2. * sx;
A_matrix.insert(A_size - 2, A_size - 2) = -1. - 3. * sx;
A_matrix.insert(A_size - 2, A_size - 3) = sx;
A_matrix.insert(A_size - 2, A_size - 1) = sx;
A_matrix.insert(A_size - 2, A_size - 1) = 2.*sx;
}
A_matrix.insert(A_size - 1, A_size - 1) = 1;