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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 | 00007 ------------------------------------------------------------------------------- 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 00013 Free Software Foundation; either version 2 of the License, or (at your 00014 option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM; if not, write to the Free Software Foundation, 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 // ************************************************************************* //