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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 limitedGrad 00027 00028 Description 00029 Limited gradient scheme applied to a runTime selected base gradient scheme. 00030 00031 SourceFiles 00032 limitedGrad.C 00033 00034 \*---------------------------------------------------------------------------*/ 00035 00036 #ifndef limitedGrad_H 00037 #define limitedGrad_H 00038 00039 #include "gradScheme.H" 00040 00041 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00042 00043 namespace Foam 00044 { 00045 00046 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00047 00048 namespace fv 00049 { 00050 00051 /*---------------------------------------------------------------------------*\ 00052 Class limitedGrad Declaration 00053 \*---------------------------------------------------------------------------*/ 00054 00055 template<class Type> 00056 class limitedGrad 00057 : 00058 public fv::gradScheme<Type> 00059 { 00060 // Private Data 00061 00062 tmp<fv::gradScheme<Type> > basicGradScheme_; 00063 00064 //- Limiter coefficient 00065 scalar k_; 00066 00067 00068 // Private Member Functions 00069 00070 inline void limitFace 00071 ( 00072 scalar& limiter, 00073 const scalar maxDelta, 00074 const scalar minDelta, 00075 const scalar extrapolate 00076 ) const; 00077 00078 00079 //- Disallow default bitwise copy construct 00080 limitedGrad(const limitedGrad&); 00081 00082 //- Disallow default bitwise assignment 00083 void operator=(const limitedGrad&); 00084 00085 00086 public: 00087 00088 //- RunTime type information 00089 TypeName("limited"); 00090 00091 00092 // Constructors 00093 00094 //- Construct from mesh and schemeData 00095 limitedGrad(const fvMesh& mesh, Istream& schemeData) 00096 : 00097 gradScheme<Type>(mesh), 00098 basicGradScheme_(fv::gradScheme<Type>::New(mesh, schemeData)), 00099 k_(readScalar(schemeData)) 00100 { 00101 if (k_ < 0 || k_ > 1) 00102 { 00103 FatalIOErrorIn 00104 ( 00105 "limitedGrad(const fvMesh& mesh, Istream& schemeData)", 00106 schemeData 00107 ) << "coefficient = " << k_ 00108 << " should be >= 0 and <= 1" 00109 << exit(FatalIOError); 00110 } 00111 } 00112 00113 00114 // Member Functions 00115 00116 tmp 00117 < 00118 GeometricField 00119 <typename outerProduct<vector, Type>::type, fvPatchField, volMesh> 00120 > grad 00121 ( 00122 const GeometricField<Type, fvPatchField, volMesh>& 00123 ) const; 00124 }; 00125 00126 00127 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00128 00129 } // End namespace fv 00130 00131 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00132 00133 } // End namespace Foam 00134 00135 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00136 00137 #endif 00138 00139 // ************************************************************************* //