NVDTVD.H

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2012 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::NVDTVD
 
Description
    Foam::NVDTVD
 
\*---------------------------------------------------------------------------*/
 
#ifndef NVDTVD_H
#define NVDTVD_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class LimitedScheme Declaration
\*---------------------------------------------------------------------------*/
 
class NVDTVD
{
 
public:
 
    typedef scalar phiType;
    typedef vector gradPhiType;
 
 
    // Null Constructor
 
        NVDTVD()
        {}
 
 
    // Member Functions
 
        scalar phict
        (
            const scalar faceFlux,
            const scalar phiP,
            const scalar phiN,
            const vector& gradcP,
            const vector& gradcN,
            const vector& d
        ) const
        {
            scalar gradf = phiN - phiP;
 
            scalar gradcf;
 
            if (faceFlux > 0)
            {
                gradcf = d & gradcP;
            }
            else
            {
                gradcf = d & gradcN;
            }
 
            if (mag(gradf) >= 1000*mag(gradcf))
            {
                return 1 - 0.5*1000*sign(gradcf)*sign(gradf);
            }
            else
            {
                return 1 - 0.5*gradf/gradcf;
            }
        }
 
 
        scalar r
        (
            const scalar faceFlux,
            const scalar phiP,
            const scalar phiN,
            const vector& gradcP,
            const vector& gradcN,
            const vector& d
        ) const
        {
            scalar gradf = phiN - phiP;
 
            scalar gradcf;
 
            if (faceFlux > 0)
            {
                gradcf = d & gradcP;
            }
            else
            {
                gradcf = d & gradcN;
            }
 
            if (mag(gradcf) >= 1000*mag(gradf))
            {
                return 2*1000*sign(gradcf)*sign(gradf) - 1;
            }
            else
            {
                return 2*(gradcf/gradf) - 1;
            }
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //