porousAlphaCourantNo.H

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    Copyright (C) 2021 Johan Roenby
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Global
    porousAlphaCourantNo

Description
    Calculates and outputs the mean and maximum Courant Numbers.

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

scalar maxAlphaCo = runTime.controlDict().get<scalar>("maxAlphaCo");
scalar alphaCoNum = 0;
scalar meanAlphaCoNum = 0;

if (mesh.nInternalFaces())
{
    scalarField sumPhi
    (
        mixture.nearInterface()().primitiveField()
       *fvc::surfaceSum(mag(phi))().primitiveField()
    );

    if (porosityEnabled)
    {
        const volScalarField& porosity = tporosity.cref();

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

        meanAlphaCoNum =
            0.5*(gSum(sumPhi)/gSum(mesh.V().field()*porosity))
           *runTime.deltaTValue();
    }
    else
    {
        alphaCoNum = 0.5*gMax(sumPhi/mesh.V().field())*runTime.deltaTValue();

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

Info<< "Interface Courant Number mean: " << meanAlphaCoNum
    << " max: " << alphaCoNum << endl;

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