197 lines
5.4 KiB
C++
197 lines
5.4 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 3.2
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::compressible::RASModels::PDRkEpsilon
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Description
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Standard k-epsilon turbulence model with additional source terms
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corresponding to PDR basic drag model (\link basic.H \endlink)
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The default model coefficients correspond to the following:
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@verbatim
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kEpsilonCoeffs
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{
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Cmu 0.09;
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C1 1.44;
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C2 1.92;
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C3 -0.33; // only for compressible
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sigmak 1.0; // only for compressible
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sigmaEps 1.3;
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Prt 1.0; // only for compressible
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}
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@endverbatim
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The turbulence source term \f$ G_{R} \f$ appears in the
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\f$ \kappa-\epsilon \f$ equation for the generation of turbulence due to
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interaction with unresolved obstacles.
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In the \f$ \epsilon \f$ equation \f$ C_{1} G_{R} \f$ is added as a source
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term.
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In the \f$ \kappa \f$ equation \f$ G_{R} \f$ is added as a source term.
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SourceFiles
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PDRkEpsilon.C
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PDRkEpsilonCorrect.C
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\*---------------------------------------------------------------------------*/
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#ifndef compressiblePDRkEpsilon_H
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#define compressiblePDRkEpsilon_H
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#include "RASModel.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace compressible
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{
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namespace RASModels
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{
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/*---------------------------------------------------------------------------*\
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Class PDRkEpsilon Declaration
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\*---------------------------------------------------------------------------*/
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class PDRkEpsilon
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:
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public RASModel
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{
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// Private data
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// Model coefficients
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dimensionedScalar Cmu_;
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dimensionedScalar C1_;
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dimensionedScalar C2_;
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dimensionedScalar sigmak_;
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dimensionedScalar sigmaEps_;
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dimensionedScalar Prt_;
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// Fields
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volScalarField k_;
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volScalarField epsilon_;
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volScalarField mut_;
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volScalarField alphat_;
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public:
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//- Runtime type information
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TypeName("PDRkEpsilon");
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// Constructors
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//- Construct from components
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PDRkEpsilon
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(
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const volScalarField& rho,
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const volVectorField& U,
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const surfaceScalarField& phi,
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const basicThermo& thermophysicalModel
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);
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//- Destructor
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virtual ~PDRkEpsilon()
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{}
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// Member Functions
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tmp<volScalarField> mut() const
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{
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return mut_;
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}
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//- Return the effective diffusivity for k
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tmp<volScalarField> DkEff() const
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{
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return tmp<volScalarField>
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(
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new volScalarField("DkEff", mut_/sigmak_ + mu())
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);
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}
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//- Return the effective diffusivity for epsilon
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tmp<volScalarField> DepsilonEff() const
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{
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return tmp<volScalarField>
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(
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new volScalarField("DepsilonEff", mut_/sigmaEps_ + mu())
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);
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}
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//- Return the effective turbulent thermal diffusivity
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tmp<volScalarField> alphaEff() const
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{
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return tmp<volScalarField>
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(
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new volScalarField("alphaEff", alphat_ + alpha())
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);
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}
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//- Return the turbulence kinetic energy
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tmp<volScalarField> k() const
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{
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return k_;
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}
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//- Return the turbulence kinetic energy dissipation rate
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tmp<volScalarField> epsilon() const
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{
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return epsilon_;
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}
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//- Return the Reynolds stress tensor
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tmp<volSymmTensorField> R() const;
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//- Return the effective stress tensor including the laminar stress
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tmp<volSymmTensorField> devRhoReff() const;
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//- Return the source term for the momentum equation
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tmp<fvVectorMatrix> divDevRhoReff() const;
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//- Solve the turbulence equations and correct the turbulence viscosity
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void correct();
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//- Read turbulenceProperties dictionary
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bool read();
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace RASModels
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} // End namespace compressible
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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