1b6f46fae0
SIMPLEC (SIMPLE-consistent) is selected by setting "consistent" option true/yes:
SIMPLE
{
nNonOrthogonalCorrectors 0;
consistent yes;
}
which relaxes the pressure in a "consistent" manner and additional
relaxation of the pressure is not generally necessary. In addition
convergence of the p-U system is better and reliable with less
aggressive relaxation of the momentum equation, e.g. for the motorbike
tutorial:
relaxationFactors
{
equations
{
U 0.9;
k 0.7;
omega 0.7;
}
}
The cost per iteration is marginally higher but the convergence rate is
better so the number of iterations can be reduced.
The SIMPLEC algorithm also provides benefit for cases with large
body-forces, e.g. SRF, see tutorials/incompressible/SRFSimpleFoam/mixer
and feature request http://www.openfoam.org/mantisbt/view.php?id=1714
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/*--------------------------------*- C++ -*----------------------------------*\
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| ========= | |
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| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
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| \\ / O peration | Version: dev |
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| \\ / A nd | Web: www.OpenFOAM.org |
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| \\/ M anipulation | |
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\*---------------------------------------------------------------------------*/
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FoamFile
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{
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version 2.0;
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format ascii;
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class dictionary;
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location "system";
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object fvSolution;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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solvers
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{
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p
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{
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solver PCG;
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preconditioner DIC;
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tolerance 1e-06;
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relTol 0.01;
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}
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"(Urel|k|epsilon|omega|R|nuTilda)"
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{
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solver smoothSolver;
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smoother symGaussSeidel;
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tolerance 1e-05;
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relTol 0.1;
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}
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}
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SIMPLE
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{
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nNonOrthogonalCorrectors 0;
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consistent yes;
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}
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relaxationFactors
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{
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equations
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{
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".*" 0.9;
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}
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}
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// ************************************************************************* //
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