foam-extend4.1-coherent-io/applications/solvers/heatTransfer/chtMultiRegionFoam/fluid/compressibleCourantNo.C

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#include "compressibleCourantNo.H"
#include "fvc.H"

Foam::scalar Foam::compressibleCourantNo
(
    const fvMesh& mesh,
    const Time& runTime,
    const volScalarField& rho,
    const surfaceScalarField& phi
)
{
    scalar CoNum = 0.0;
    scalar meanCoNum = 0.0;

    //- Can have fluid domains with 0 cells so do not test.
    //if (mesh.nInternalFaces())
    {
        surfaceScalarField SfUfbyDelta =
            mesh.surfaceInterpolation::deltaCoeffs()
          * mag(phi)
          / fvc::interpolate(rho);

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

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

    Info<< "Region: " << mesh.name() << " Courant Number mean: " << meanCoNum
        << " max: " << CoNum << endl;

    return CoNum;
}


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