foam-extend4.1-coherent-io/applications/solvers/finiteArea/liquidFilmFoam/surfaceCourantNo.H

/*---------------------------------------------------------------------------*\
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License
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    General Public License for more details.

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Global
    surfaceCourantNo

Author
    Hrvoje Jasak, Wikki Ltd.  All rights reserved.

Description
    Calculates and outputs the mean and maximum Courant Numbers for the
    Finite Area method.

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

scalar CoNum = 0.0;
scalar meanCoNum = 0.0;
scalar velMag = 0.0;

if (aMesh.nInternalEdges())
{
    edgeScalarField SfUfbyDelta =
        aMesh.edgeInterpolation::deltaCoeffs()*mag(phis);

    CoNum = max(SfUfbyDelta/aMesh.magLe())
        .value()*runTime.deltaT().value();

    meanCoNum = (sum(SfUfbyDelta)/sum(aMesh.magLe()))
        .value()*runTime.deltaT().value();

    velMag = max(mag(phis)/aMesh.magLe()).value();
}

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

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