interfaceCompression.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
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-------------------------------------------------------------------------------
    Copyright (C) 2011 OpenFOAM Foundation
-------------------------------------------------------------------------------
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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::interfaceCompressionLimiter
 
Description
    Interface compression scheme currently based on the generic limited
    scheme although it does not use the NVD/TVD functions.
 
SourceFiles
    interfaceCompression.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef interfaceCompression_H
#define interfaceCompression_H
 
#include "vector.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class interfaceCompressionWeight Declaration
\*---------------------------------------------------------------------------*/
 
class interfaceCompressionLimiter
{
 
public:
 
    interfaceCompressionLimiter(Istream&)
    {}
 
    scalar limiter
    (
        const scalar cdWeight,
        const scalar faceFlux,
        const scalar phiP,
        const scalar phiN,
        const vector&,
        const scalar
    ) const
    {
        // Quadratic compression scheme
        //return min(max(4*min(phiP*(1 - phiP), phiN*(1 - phiN)), 0), 1);
 
        // Quartic compression scheme
        return
            min(max(
            1 - max(sqr(1 - 4*phiP*(1 - phiP)), sqr(1 - 4*phiN*(1 - phiN))),
            0), 1);
    }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //