1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | foam-extend: Open Source CFD
4 \\ / O peration | Version: 3.2
5 \\ / A nd | Web: http://www.foam-extend.org
6 \\/ M anipulation | For copyright notice see file Copyright
7 -------------------------------------------------------------------------------
9 This file is part of foam-extend.
11 foam-extend is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation, either version 3 of the License, or (at your
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16 foam-extend is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
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25 Foam::incompressible::RASModels::RNGkEpsilon
28 Renormalisation group k-epsilon turbulence model for incompressible flows.
30 The default model coefficients correspond to the following:
47 \*---------------------------------------------------------------------------*/
54 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
58 namespace incompressible
63 /*---------------------------------------------------------------------------*\
64 Class RNGkEpsilon Declaration
65 \*---------------------------------------------------------------------------*/
75 dimensionedScalar Cmu_;
76 dimensionedScalar C1_;
77 dimensionedScalar C2_;
78 dimensionedScalar sigmak_;
79 dimensionedScalar sigmaEps_;
80 dimensionedScalar eta0_;
81 dimensionedScalar beta_;
87 volScalarField epsilon_;
93 //- Runtime type information
94 TypeName("RNGkEpsilon");
98 //- Construct from components
101 const volVectorField& U,
102 const surfaceScalarField& phi,
103 transportModel& transport
108 virtual ~RNGkEpsilon()
114 //- Return the turbulence viscosity
115 virtual tmp<volScalarField> nut() const
120 //- Return the effective diffusivity for k
121 tmp<volScalarField> DkEff() const
123 return tmp<volScalarField>
125 new volScalarField("DkEff", nut_/sigmak_ + nu())
129 //- Return the effective diffusivity for epsilon
130 tmp<volScalarField> DepsilonEff() const
132 return tmp<volScalarField>
134 new volScalarField("DepsilonEff", nut_/sigmaEps_ + nu())
138 //- Return the turbulence kinetic energy
139 virtual tmp<volScalarField> k() const
144 //- Return the turbulence kinetic energy dissipation rate
145 virtual tmp<volScalarField> epsilon() const
150 //- Return the Reynolds stress tensor
151 virtual tmp<volSymmTensorField> R() const;
153 //- Return the effective stress tensor including the laminar stress
154 virtual tmp<volSymmTensorField> devReff() const;
156 //- Return the source term for the momentum equation
157 virtual tmp<fvVectorMatrix> divDevReff(volVectorField& U) const;
159 //- Solve the turbulence equations and correct the turbulence viscosity
160 virtual void correct();
162 //- Read RASProperties dictionary
167 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
169 } // End namespace RASModels
170 } // End namespace incompressible
171 } // End namespace Foam
173 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
177 // ************************************************************************* //