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ENH: fvMatrix: debug printing of diagonal dominance

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This commit is contained in:
mattijs
2011-11-09 12:31:57 +00:00
parent 03baed76ec
commit ccefe8bb90
2 changed files with 35 additions and 0 deletions
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34
src/finiteVolume/fvMatrices/fvMatrix/fvMatrix.C
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@ -587,7 +587,41 @@ void Foam::fvMatrix<Type>::relax(const scalar alpha)
}
}
if (debug)
{
// Calculate amount of non-dominance.
label nNon = 0;
scalar maxNon = 0.0;
scalar sumNon = 0.0;
forAll(D, celli)
{
scalar d = (sumOff[celli] - D[celli])/D[celli];
if (d > 0)
{
nNon++;
maxNon = max(maxNon, d);
sumNon += d;
}
}
reduce(nNon, sumOp<label>());
reduce(maxNon, maxOp<scalar>());
reduce(sumNon, sumOp<scalar>());
sumNon /= returnReduce(D.size(), sumOp<label>());
InfoIn("fvMatrix<Type>::relax(const scalar alpha)")
<< "Matrix dominance test for " << psi_.name() << nl
<< " number of non-dominant cells : " << nNon << nl
<< " maximum relative non-dominance : " << maxNon << nl
<< " average relative non-dominance : " << sumNon << nl
<< endl;
}
// Ensure the matrix is diagonally dominant...
// (assumes that the central coefficient is positive)
max(D, D, sumOff);
// ... then relax

1
src/finiteVolume/fvMatrices/fvMatrix/fvMatrix.H
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@ -364,6 +364,7 @@ public:
// alpha = 1 : diagonally equal
// alpha < 1 : diagonally dominant
// alpha = 0 : do nothing
// Note: Requires positive diagonal.
void relax(const scalar alpha);
//- Relax matrix (for steady-state solution).