alphaCourantNo.H

/*---------------------------------------------------------------------------*\
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    Copyright (C) 2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
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Global
    alphaCourantNo

Description
    Calculates and outputs the mean and maximum Courant Numbers.

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

scalar maxAlphaCo
(
    runTime.controlDict().get<scalar>("maxAlphaCo")
);

scalar maxAlphaDdt
(
    runTime.controlDict().getOrDefault("maxAlphaDdt", GREAT)
);

scalar maxDi
(
    runTime.controlDict().getOrDefault<scalar>("maxDi", GREAT)
);

scalar alphaCoNum = 0.0;
scalar meanAlphaCoNum = 0.0;
scalar ddtAlphaNum = 0.0;
scalar DiNum = 0.0;

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

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

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

    ddtAlphaNum = fluid.ddtAlphaMax().value()*runTime.deltaTValue();

    DiNum = fluid.maxDiffNo();
}

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

Info<< "Maximum ddtAlpha : " << ddtAlphaNum << endl;

Info<< "Maximum DiffNum : " << DiNum << endl;


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