CourantNo.H

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    Copyright (C) 2016-2022 OpenCFD Ltd.
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    This file is part of OpenFOAM.
 
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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;
 
// ************************************************************************* //