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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 NVDTVD 00027 00028 Description 00029 00030 SourceFiles 00031 NVDTVD.C 00032 00033 \*---------------------------------------------------------------------------*/ 00034 00035 #ifndef NVDTVD_H 00036 #define NVDTVD_H 00037 00038 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00039 00040 namespace Foam 00041 { 00042 00043 /*---------------------------------------------------------------------------*\ 00044 Class LimitedScheme Declaration 00045 \*---------------------------------------------------------------------------*/ 00046 00047 class NVDTVD 00048 { 00049 00050 public: 00051 00052 typedef scalar phiType; 00053 typedef vector gradPhiType; 00054 00055 00056 // Null Constructor 00057 00058 NVDTVD() 00059 {} 00060 00061 00062 // Member Functions 00063 00064 scalar phict 00065 ( 00066 const scalar cdWeight, 00067 const scalar faceFlux, 00068 const scalar phiP, 00069 const scalar phiN, 00070 const vector& gradcP, 00071 const vector& gradcN, 00072 const vector& d 00073 ) const 00074 { 00075 scalar gradf = phiN - phiP; 00076 00077 scalar gradcf; 00078 00079 if (faceFlux > 0) 00080 { 00081 gradcf = d & gradcP; 00082 } 00083 else 00084 { 00085 gradcf = d & gradcN; 00086 } 00087 00088 // Stabilise for division 00089 gradcf = stabilise(gradcf, VSMALL); 00090 00091 return 1 - 0.5*gradf/gradcf; 00092 } 00093 00094 00095 scalar r 00096 ( 00097 const scalar cdWeight, 00098 const scalar faceFlux, 00099 const scalar phiP, 00100 const scalar phiN, 00101 const vector& gradcP, 00102 const vector& gradcN, 00103 const vector& d 00104 ) const 00105 { 00106 scalar gradf = phiN - phiP; 00107 00108 scalar gradcf; 00109 00110 if (faceFlux > 0) 00111 { 00112 gradcf = d & gradcP; 00113 } 00114 else 00115 { 00116 gradcf = d & gradcN; 00117 } 00118 00119 // Stabilise for division 00120 gradf = stabilise(gradf, VSMALL); 00121 00122 return 2*gradcf/gradf - 1; 00123 } 00124 }; 00125 00126 00127 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00128 00129 } // End namespace Foam 00130 00131 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00132 00133 #endif 00134 00135 // ************************************************************************* //