CourantNo.H

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    Copyright (C) 2016-2022 OpenCFD Ltd.
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Global
    CourantNo

Description
    Calculates and outputs the mean and maximum Courant Numbers.

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

scalar CoNum = 0.0;
scalar meanCoNum = 0.0;

if (mesh.nInternalFaces())
{
    surfaceScalarField phiMask
    (
        localMin<scalar>(mesh).interpolate(cellMask + interpolatedCells)
    );

    scalarField sumPhi(fvc::surfaceSum(mag(phiMask*phi))().internalField());

    CoNum = 0.5*gMax(sumPhi/mesh.V().field())*runTime.deltaTValue();

    meanCoNum =
        0.5*(gSum(sumPhi)/gSum(mesh.V().field()))*runTime.deltaTValue();
}

Info<< "Courant Number mean: " << meanCoNum
    << " max: " << CoNum << endl;

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