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vanLeer.H

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00001 /*---------------------------------------------------------------------------*\
00002   =========                 |
00003   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
00004    \\    /   O peration     |
00005     \\  /    A nd           | Copyright (C) 1991-2005 OpenCFD Ltd.
00006      \\/     M anipulation  |
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00008 License
00009     This file is part of OpenFOAM.
00010 
00011     OpenFOAM is free software; you can redistribute it and/or modify it
00012     under the terms of the GNU General Public License as published by the
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00015 
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00019     for more details.
00020 
00021     You should have received a copy of the GNU General Public License
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00023     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
00024 
00025 Class
00026     vanLeerLimiter
00027 
00028 Description
00029     Class with limiter function which returns the limiter for the
00030     vanLeer differencing scheme based on r obtained from the LimiterFunc
00031     class.
00032 
00033     Used in conjunction with the template class LimitedScheme.
00034 
00035 SourceFiles
00036     vanLeer.C
00037 
00038 \*---------------------------------------------------------------------------*/
00039 
00040 #ifndef vanLeer_H
00041 #define vanLeer_H
00042 
00043 #include "vector.H"
00044 
00045 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00046 
00047 namespace Foam
00048 {
00049 
00050 /*---------------------------------------------------------------------------*\
00051                            Class vanLeerLimiter Declaration
00052 \*---------------------------------------------------------------------------*/
00053 
00054 template<class LimiterFunc>
00055 class vanLeerLimiter
00056 :
00057     public LimiterFunc
00058 {
00059 
00060 public:
00061 
00062     vanLeerLimiter(Istream&)
00063     {}
00064 
00065     scalar limiter
00066     (
00067         const scalar cdWeight,
00068         const scalar faceFlux,
00069         const typename LimiterFunc::phiType& phiP,
00070         const typename LimiterFunc::phiType& phiN,
00071         const typename LimiterFunc::gradPhiType& gradcP,
00072         const typename LimiterFunc::gradPhiType& gradcN,
00073         const vector& d
00074     ) const
00075     {
00076         scalar r = LimiterFunc::r
00077         (
00078             cdWeight, faceFlux, phiP, phiN, gradcP, gradcN, d
00079         );
00080 
00081         return min(max((r + mag(r))/(mag(r) + 1), 0), 2);
00082     }
00083 };
00084 
00085 
00086 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00087 
00088 } // End namespace Foam
00089 
00090 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00091 
00092 #endif
00093 
00094 // ************************************************************************* //
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