alphaEqnsSubCycle.H

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{
    label nAlphaCorr
    (
        readLabel(piso.lookup("nAlphaCorr"))
    );

    label nAlphaSubCycles
    (
        readLabel(piso.lookup("nAlphaSubCycles"))
    );

    surfaceScalarField phic = mag(phi/mesh.magSf());
    phic = min(interface.cAlpha()*phic, max(phic));

    fvc::makeAbsolute(phi, U);
    volScalarField divU = fvc::div(phi);
    fvc::makeRelative(phi, U);

    if (nAlphaSubCycles > 1)
    {
        dimensionedScalar totalDeltaT = runTime.deltaT();
        surfaceScalarField rhoPhiSum = 0.0*rhoPhi;

        for
        (
            subCycle<volScalarField> alphaSubCycle(alpha1, nAlphaSubCycles);
            !(++alphaSubCycle).end();
        )
        {
            #include "../alphaEqns.H"
            rhoPhiSum += (runTime.deltaT()/totalDeltaT)*rhoPhi;
        }

        rhoPhi = rhoPhiSum;
    }
    else
    {
        #include "../alphaEqns.H"
    }

    if (oCorr == 0)
    {
        interface.correct();
    }
}