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fisch January 26, 2012 04:03

order of time integration schemes
 
Hello,

i'm performing convergence order tests of a few OF solver.

Currently i try to enstablish 2nd order time integration in my tests.
I can establish 2nd order for the backward and the CrankNicholson schemes only in the laplacianFoam solver; but not in the pisoFoam or pimpleFoam solvers.

Does anybody know if these schemes are really working 2nd order (on orthogonal meshes) in all solvers or is this behavior solver dependent???

Or do i have some mistakes in my fvSchemes file below or do i need special settings in the fvSolution?

I'm grateful for all hints.
Thanks,
Rupert


I'm calculating currently with Version 2.1.x
My fvSchemes file for a orthogonal mesh looks e.g.:

FoamFile
{
version 2.1;
format ascii;
class dictionary;
location "system";
object fvSchemes;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

ddtSchemes
{
default CrankNicholson 1;
}

gradSchemes
{
default none;
grad(p) Gauss linear;
grad(U) Gauss linear;
}

divSchemes
{
div(phi,U) Gauss linear;
div((nuEff*dev(T(grad(U))))) Gauss linear;

}

laplacianSchemes
{
default none;
laplacian(nuEff,U) Gauss linear uncorrected;
laplacian((1|A(U)),p) Gauss linear uncorrected;
}

interpolationSchemes
{
default linear;
}

snGradSchemes
{
default uncorrected;
}

fluxRequired
{
default no;
p ;
}

// ************************************************** *********************** //


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