MULES.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2011-2015 OpenFOAM Foundation
    Copyright (C) 2016 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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#include "MULES.H"
#include "profiling.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 
void Foam::MULES::limitSum(UPtrList<scalarField>& phiPsiCorrs)
{
    forAll(phiPsiCorrs[0], facei)
    {
        scalar sumPos = 0;
        scalar sumNeg = 0;
 
        for (int phasei=0; phasei<phiPsiCorrs.size(); phasei++)
        {
            if (phiPsiCorrs[phasei][facei] > 0)
            {
                sumPos += phiPsiCorrs[phasei][facei];
            }
            else
            {
                sumNeg += phiPsiCorrs[phasei][facei];
            }
        }
 
        scalar sum = sumPos + sumNeg;
 
        if (sum > 0 && sumPos > VSMALL)
        {
            scalar lambda = -sumNeg/sumPos;
 
            for (int phasei=0; phasei<phiPsiCorrs.size(); phasei++)
            {
                if (phiPsiCorrs[phasei][facei] > 0)
                {
                    phiPsiCorrs[phasei][facei] *= lambda;
                }
            }
        }
        else if (sum < 0 && sumNeg < -VSMALL)
        {
            scalar lambda = -sumPos/sumNeg;
 
            for (int phasei=0; phasei<phiPsiCorrs.size(); phasei++)
            {
                if (phiPsiCorrs[phasei][facei] < 0)
                {
                    phiPsiCorrs[phasei][facei] *= lambda;
                }
            }
        }
    }
}
 
 
void Foam::MULES::limitSum
(
    const UPtrList<const scalarField>& alphas,
    UPtrList<scalarField>& phiPsiCorrs,
    const labelHashSet& fixed
)
{
    labelHashSet notFixed(identity(phiPsiCorrs.size()));
    notFixed -= fixed;
 
    forAll(phiPsiCorrs[0], facei)
    {
        scalar alphaNotFixed = 0, corrNotFixed = 0;
        forAllConstIter(labelHashSet, notFixed, iter)
        {
            alphaNotFixed += alphas[iter.key()][facei];
            corrNotFixed += phiPsiCorrs[iter.key()][facei];
        }
 
        scalar corrFixed = 0;
        forAllConstIter(labelHashSet, fixed, iter)
        {
            corrFixed += phiPsiCorrs[iter.key()][facei];
        }
 
        const scalar sumCorr = corrNotFixed + corrFixed;
 
        const scalar lambda = - sumCorr/alphaNotFixed;
 
        forAllConstIter(labelHashSet, notFixed, iter)
        {
            phiPsiCorrs[iter.key()][facei] += lambda*alphas[iter.key()][facei];
        }
    }
}
 
// ************************************************************************* //