foam-extend4.1-coherent-io/applications/solvers/combustion/PDRFoam/StCourantNo.H

/*---------------------------------------------------------------------------*\
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   \\    /   O peration     | Version:     3.2
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    General Public License for more details.

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Global
    CourantNo

Description
    Calculates and outputs the mean and maximum Courant Numbers.

\*---------------------------------------------------------------------------*/

{
    scalar meanStCoNum = 0.0;

    if (mesh.nInternalFaces())
    {
        surfaceScalarField SfUfbyDelta =
            mesh.surfaceInterpolation::deltaCoeffs()
        *mag(phiSt/fvc::interpolate(rho));

        StCoNum =
            max(SfUfbyDelta/mesh.magSf()).value()
           *runTime.deltaT().value();

        meanStCoNum =
            (sum(SfUfbyDelta)/sum(mesh.magSf())).value()
        *runTime.deltaT().value();
    }

    Info<< "St courant Number mean: " << meanStCoNum
        << " max: " << StCoNum << endl;
}

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