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fvMatrix: Improved the relaxation of the matrix in the case that the diagonal is initially negative

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This commit is contained in:
Henry 2012-02-17 12:45:10 +00:00
parent e7b828d69c
commit f71567a71d
1 changed files with 7 additions and 4 deletions
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11
src/finiteVolume/fvMatrices/fvMatrix/fvMatrix.C
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@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2012 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -596,7 +596,7 @@ void Foam::fvMatrix<Type>::relax(const scalar alpha)
scalar sumNon = 0.0;
forAll(D, celli)
{
scalar d = (sumOff[celli] - D[celli])/D[celli];
scalar d = (sumOff[celli] - D[celli])/mag(D[celli]);
if (d > 0)
{
@ -621,8 +621,11 @@ void Foam::fvMatrix<Type>::relax(const scalar alpha)
// Ensure the matrix is diagonally dominant...
// (assumes that the central coefficient is positive)
max(D, D, sumOff);
// Assumes that the central coefficient is positive and ensures it is
forAll(D, celli)
{
D[celli] = max(mag(D[celli]), sumOff[celli]);
}
// ... then relax
D /= alpha;