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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 LaunderSharmaKE 00027 00028 Description 00029 Launder and Sharma low-Reynolds number k-epsilon turbulence model. 00030 00031 SourceFiles 00032 LaunderSharmaKE.C 00033 LaunderSharmaKECorrect.C 00034 00035 \*---------------------------------------------------------------------------*/ 00036 00037 #ifndef LaunderSharmaKE_H 00038 #define LaunderSharmaKE_H 00039 00040 #include "turbulenceModel.H" 00041 00042 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00043 00044 namespace Foam 00045 { 00046 namespace turbulenceModels 00047 { 00048 00049 /*---------------------------------------------------------------------------*\ 00050 Class LaunderSharmaKE Declaration 00051 \*---------------------------------------------------------------------------*/ 00052 00053 class LaunderSharmaKE 00054 : 00055 public turbulenceModel 00056 { 00057 // Private data 00058 00059 dimensionedScalar Cmu; 00060 dimensionedScalar C1; 00061 dimensionedScalar C2; 00062 dimensionedScalar alphaEps; 00063 00064 volScalarField k_; 00065 volScalarField epsilonTilda_; 00066 00067 volScalarField nut_; 00068 00069 00070 // Private member functions 00071 00072 tmp<volScalarField> fMu() const; 00073 tmp<volScalarField> f2() const; 00074 00075 00076 public: 00077 00078 //- Runtime type information 00079 TypeName("LaunderSharmaKE"); 00080 00081 // Constructors 00082 00083 //- from components 00084 LaunderSharmaKE 00085 ( 00086 const volVectorField& U, 00087 const surfaceScalarField& phi, 00088 transportModel& transport 00089 ); 00090 00091 00092 // Destructor 00093 00094 ~LaunderSharmaKE(){} 00095 00096 00097 // Member Functions 00098 00099 tmp<volScalarField> nut() const 00100 { 00101 return nut_; 00102 } 00103 00104 //- Return the effective diffusivity for k 00105 tmp<volScalarField> DkEff() const 00106 { 00107 return tmp<volScalarField> 00108 ( 00109 new volScalarField("DkEff", nut_ + nu()) 00110 ); 00111 } 00112 00113 //- Return the effective diffusivity for epsilon 00114 tmp<volScalarField> DepsilonEff() const 00115 { 00116 return tmp<volScalarField> 00117 ( 00118 new volScalarField("DepsilonEff", alphaEps*nut_ + nu()) 00119 ); 00120 } 00121 00122 tmp<volScalarField> k() const 00123 { 00124 return k_; 00125 } 00126 00127 //- Note that epsilonTilda is returned as epsilon. 00128 // This is the appropriate variable for most purposes. 00129 tmp<volScalarField> epsilon() const 00130 { 00131 return epsilonTilda_; 00132 } 00133 00134 tmp<volTensorField> R() const; 00135 00136 tmp<fvVectorMatrix> divR(volVectorField& U) const; 00137 00138 void correct(); 00139 00140 //- Read turbulenceProperties dictionary 00141 bool read(); 00142 }; 00143 00144 00145 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00146 00147 } // End namespace turbulenceModels 00148 } // End namespace Foam 00149 00150 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00151 00152 #endif 00153 00154 // ************************************************************************* //