UMIST.H

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License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::UMISTLimiter

Description
    Class with limiter function which returns the limiter for the
    UMIST interpolation scheme.

    Used in conjunction with the template class LimitedScheme.

SourceFiles
    UMIST.C

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

#ifndef UMIST_H
#define UMIST_H

#include "vector.H"

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                        Class UMISTLimiter Declaration
\*---------------------------------------------------------------------------*/

template<class LimiterFunc>
class UMISTLimiter
:
    public LimiterFunc
{

public:

    UMISTLimiter(Istream&)
    {}

    scalar limiter
    (
        const scalar cdWeight,
        const scalar faceFlux,
        const typename LimiterFunc::phiType& phiP,
        const typename LimiterFunc::phiType& phiN,
        const typename LimiterFunc::gradPhiType& gradcP,
        const typename LimiterFunc::gradPhiType& gradcN,
        const vector& d
    ) const
    {
        scalar r = LimiterFunc::r
        (
            faceFlux, phiP, phiN, gradcP, gradcN, d
        );

        return max(min(min(min(2*r, 0.75*r + 0.25), 0.25*r + 0.75), 2), 0);
    }
};


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

} // End namespace Foam

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

#endif

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