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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 GenEddyVisc 00027 00028 Description 00029 General base class for all models that can be implemented as 00030 an eddy viscosity, i.e. algebraic and one-equation models. 00031 00032 Contains fields for k (SGS turbulent kinetic energy), gamma 00033 (modelled viscosity) and epsilon (SGS dissipation). 00034 00035 SourceFiles 00036 GenEddyVisc.C 00037 00038 \*---------------------------------------------------------------------------*/ 00039 00040 #ifndef compressibleGenEddyVisc_H 00041 #define compressibleGenEddyVisc_H 00042 00043 #include "LESmodel.H" 00044 00045 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00046 00047 namespace Foam 00048 { 00049 namespace compressible 00050 { 00051 namespace LESmodels 00052 { 00053 00054 /*---------------------------------------------------------------------------*\ 00055 Class GenEddyVisc Declaration 00056 \*---------------------------------------------------------------------------*/ 00057 00058 class GenEddyVisc 00059 : 00060 virtual public LESmodel 00061 { 00062 // Private Member Functions 00063 00064 // Disallow default bitwise copy construct and assignment 00065 GenEddyVisc(const GenEddyVisc&); 00066 GenEddyVisc& operator=(const GenEddyVisc&); 00067 00068 00069 protected: 00070 00071 dimensionedScalar ce_; 00072 00073 volScalarField k_; 00074 volScalarField muSgs_; 00075 00076 00077 public: 00078 00079 // Constructors 00080 00081 //- Construct from components 00082 GenEddyVisc 00083 ( 00084 const volScalarField& rho, 00085 const volVectorField& U, 00086 const surfaceScalarField& phi, 00087 const basicThermo& thermoPhysicalModel 00088 ); 00089 00090 00091 // Destructor 00092 00093 virtual ~GenEddyVisc() 00094 {} 00095 00096 00097 // Member Functions 00098 00099 //- Evaluate B. This is done on the fly : its not usually necessary, 00100 // but will be if we want to compare with experiments or DNS 00101 virtual tmp<volTensorField> B() const; 00102 00103 //- Return SGS kinetic energy 00104 virtual tmp<volScalarField> k() const 00105 { 00106 return k_; 00107 } 00108 00109 //- Return sub-grid disipation rate 00110 virtual tmp<volScalarField> epsilon() const 00111 { 00112 return ce_*k_*sqrt(k_)/delta(); 00113 } 00114 00115 //- Return viscosity 00116 virtual tmp<volScalarField> muSgs() const 00117 { 00118 return muSgs_; 00119 } 00120 00121 //- Return thermal conductivity 00122 virtual tmp<volScalarField> alphaEff() const 00123 { 00124 return tmp<volScalarField> 00125 ( 00126 new volScalarField("alphaEff", muSgs_ + alpha()) 00127 ); 00128 } 00129 00130 //- Returns divergence of B : i.e. the additional term in the 00131 // filtered NSE. 00132 virtual tmp<fvVectorMatrix> divRhoB(volVectorField& U) const; 00133 00134 //- Correct Eddy-Viscosity and related properties 00135 virtual void correct(const tmp<volTensorField>& gradU); 00136 00137 //- Read turbulenceProperties dictionary 00138 bool read(); 00139 }; 00140 00141 00142 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00143 00144 } // End namespace LESmodels 00145 } // End namespace compressible 00146 } // End namespace Foam 00147 00148 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00149 00150 #endif 00151 00152 // ************************************************************************* //