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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 MUSCLLimiter 00027 00028 Description 00029 Class with limiter function which returns the limiter for the 00030 van Leer's MUSCL differencing scheme. 00031 00032 Used in conjunction with the template class LimitedScheme. 00033 00034 SourceFiles 00035 MUSCL.C 00036 00037 \*---------------------------------------------------------------------------*/ 00038 00039 #ifndef MUSCL_H 00040 #define MUSCL_H 00041 00042 #include "vector.H" 00043 00044 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00045 00046 namespace Foam 00047 { 00048 00049 /*---------------------------------------------------------------------------*\ 00050 Class MUSCLWeight Declaration 00051 \*---------------------------------------------------------------------------*/ 00052 00053 template<class LimiterFunc> 00054 class MUSCLLimiter 00055 : 00056 public LimiterFunc 00057 { 00058 00059 public: 00060 00061 MUSCLLimiter(Istream&) 00062 {} 00063 00064 scalar limiter 00065 ( 00066 const scalar cdWeight, 00067 const scalar faceFlux, 00068 const typename LimiterFunc::phiType& phiP, 00069 const typename LimiterFunc::phiType& phiN, 00070 const typename LimiterFunc::gradPhiType& gradcP, 00071 const typename LimiterFunc::gradPhiType& gradcN, 00072 const vector& d 00073 ) const 00074 { 00075 scalar r = LimiterFunc::r 00076 ( 00077 cdWeight, faceFlux, phiP, phiN, gradcP, gradcN, d 00078 ); 00079 00080 return max(min(min(2*r, 0.5*r + 0.5), 2), 0); 00081 } 00082 }; 00083 00084 00085 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00086 00087 } // End namespace Foam 00088 00089 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00090 00091 #endif 00092 00093 // ************************************************************************* //