TurbulenceModels: Added RNGkEpsilon

src/TurbulenceModels/compressible/turbulentFluidThermoModels/turbulentFluidThermoModels.C

@@ -57,6 +57,9 @@ makeRASModel(SpalartAllmaras);
 #include "kEpsilon.H"
 makeRASModel(kEpsilon);
 
+#include "RNGkEpsilon.H"
+makeRASModel(RNGkEpsilon);
+
 #include "realizableKE.H"
 makeRASModel(realizableKE);
 

src/TurbulenceModels/incompressible/turbulentTransportModels/turbulentTransportModels.C

@@ -55,6 +55,9 @@ makeRASModel(SpalartAllmaras);
 #include "kEpsilon.H"
 makeRASModel(kEpsilon);
 
+#include "RNGkEpsilon.H"
+makeRASModel(RNGkEpsilon);
+
 #include "realizableKE.H"
 makeRASModel(realizableKE);
 

src/TurbulenceModels/turbulenceModels/RAS/RNGkEpsilon/RNGkEpsilon.C

@@ -0,0 +1,322 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "RNGkEpsilon.H"
+#include "bound.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace RASModels
+{
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+template<class BasicTurbulenceModel>
+void RNGkEpsilon<BasicTurbulenceModel>::correctNut()
+{
+    this->nut_ = Cmu_*sqr(k_)/epsilon_;
+    this->nut_.correctBoundaryConditions();
+}
+
+
+template<class BasicTurbulenceModel>
+tmp<fvScalarMatrix> RNGkEpsilon<BasicTurbulenceModel>::kSource() const
+{
+    return tmp<fvScalarMatrix>
+    (
+        new fvScalarMatrix
+        (
+            k_,
+            dimVolume*this->rho_.dimensions()*k_.dimensions()
+            /dimTime
+        )
+    );
+}
+
+
+template<class BasicTurbulenceModel>
+tmp<fvScalarMatrix> RNGkEpsilon<BasicTurbulenceModel>::epsilonSource() const
+{
+    return tmp<fvScalarMatrix>
+    (
+        new fvScalarMatrix
+        (
+            epsilon_,
+            dimVolume*this->rho_.dimensions()*epsilon_.dimensions()
+            /dimTime
+        )
+    );
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+template<class BasicTurbulenceModel>
+RNGkEpsilon<BasicTurbulenceModel>::RNGkEpsilon
+(
+    const alphaField& alpha,
+    const rhoField& rho,
+    const volVectorField& U,
+    const surfaceScalarField& alphaRhoPhi,
+    const surfaceScalarField& phi,
+    const transportModel& transport,
+    const word& propertiesName,
+    const word& type
+)
+:
+    eddyViscosity<RASModel<BasicTurbulenceModel> >
+    (
+        type,
+        alpha,
+        rho,
+        U,
+        alphaRhoPhi,
+        phi,
+        transport,
+        propertiesName
+    ),
+
+    Cmu_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "Cmu",
+            this->coeffDict_,
+            0.0845
+        )
+    ),
+    C1_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "C1",
+            this->coeffDict_,
+            1.42
+        )
+    ),
+    C2_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "C2",
+            this->coeffDict_,
+            1.68
+        )
+    ),
+    C3_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "C3",
+            this->coeffDict_,
+            -0.33
+        )
+    ),
+    sigmak_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "sigmak",
+            this->coeffDict_,
+            0.71942
+        )
+    ),
+    sigmaEps_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "sigmaEps",
+            this->coeffDict_,
+            0.71942
+        )
+    ),
+    eta0_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "eta0",
+            this->coeffDict_,
+            4.38
+        )
+    ),
+    beta_
+    (
+        dimensioned<scalar>::lookupOrAddToDict
+        (
+            "beta",
+            this->coeffDict_,
+            0.012
+        )
+    ),
+
+    k_
+    (
+        IOobject
+        (
+            IOobject::groupName("k", U.group()),
+            this->runTime_.timeName(),
+            this->mesh_,
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        this->mesh_
+    ),
+    epsilon_
+    (
+        IOobject
+        (
+            IOobject::groupName("epsilon", U.group()),
+            this->runTime_.timeName(),
+            this->mesh_,
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        this->mesh_
+    )
+{
+    bound(k_, this->kMin_);
+    bound(epsilon_, this->epsilonMin_);
+
+    if (type == typeName)
+    {
+        correctNut();
+        this->printCoeffs(type);
+    }
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class BasicTurbulenceModel>
+bool RNGkEpsilon<BasicTurbulenceModel>::read()
+{
+    if (eddyViscosity<RASModel<BasicTurbulenceModel> >::read())
+    {
+        Cmu_.readIfPresent(this->coeffDict());
+        C1_.readIfPresent(this->coeffDict());
+        C2_.readIfPresent(this->coeffDict());
+        C3_.readIfPresent(this->coeffDict());
+        sigmak_.readIfPresent(this->coeffDict());
+        sigmaEps_.readIfPresent(this->coeffDict());
+        eta0_.readIfPresent(this->coeffDict());
+        beta_.readIfPresent(this->coeffDict());
+
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+
+template<class BasicTurbulenceModel>
+void RNGkEpsilon<BasicTurbulenceModel>::correct()
+{
+    if (!this->turbulence_)
+    {
+        return;
+    }
+
+    // Local references
+    const alphaField& alpha = this->alpha_;
+    const rhoField& rho = this->rho_;
+    const surfaceScalarField& alphaRhoPhi = this->alphaRhoPhi_;
+    const volVectorField& U = this->U_;
+    volScalarField& nut = this->nut_;
+
+    eddyViscosity<RASModel<BasicTurbulenceModel> >::correct();
+
+    volScalarField divU(fvc::div(fvc::absolute(this->phi(), U)));
+
+    tmp<volTensorField> tgradU = fvc::grad(U);
+    volScalarField S2((tgradU() && dev(twoSymm(tgradU()))));
+    tgradU.clear();
+
+    volScalarField G(this->GName(), nut*S2);
+
+    volScalarField eta(sqrt(mag(S2))*k_/epsilon_);
+    volScalarField eta3(eta*sqr(eta));
+
+    volScalarField R
+    (
+        ((eta*(-eta/eta0_ + scalar(1)))/(beta_*eta3 + scalar(1)))
+    );
+
+    // Update epsilon and G at the wall
+    epsilon_.boundaryField().updateCoeffs();
+
+    // Dissipation equation
+    tmp<fvScalarMatrix> epsEqn
+    (
+        fvm::ddt(alpha, rho, epsilon_)
+      + fvm::div(alphaRhoPhi, epsilon_)
+      - fvm::laplacian(alpha*rho*DepsilonEff(), epsilon_)
+     ==
+        (C1_ - R)*alpha*rho*G*epsilon_/k_
+      - fvm::SuSp(((2.0/3.0)*C1_ + C3_)*alpha*rho*divU, epsilon_)
+      - fvm::Sp(C2_*alpha*rho*epsilon_/k_, epsilon_)
+      + epsilonSource()
+    );
+
+    epsEqn().relax();
+
+    epsEqn().boundaryManipulate(epsilon_.boundaryField());
+
+    solve(epsEqn);
+    bound(epsilon_, this->epsilonMin_);
+
+
+    // Turbulent kinetic energy equation
+
+    tmp<fvScalarMatrix> kEqn
+    (
+        fvm::ddt(alpha, rho, k_)
+      + fvm::div(alphaRhoPhi, k_)
+      - fvm::Sp(fvc::ddt(alpha, rho) + fvc::div(alphaRhoPhi), k_)
+      - fvm::laplacian(alpha*rho*DkEff(), k_)
+     ==
+        alpha*rho*G
+      - fvm::SuSp((2.0/3.0)*alpha*rho*divU, k_)
+      - fvm::Sp(alpha*rho*epsilon_/k_, k_)
+      + kSource()
+    );
+
+    kEqn().relax();
+    solve(kEqn);
+    bound(k_, this->kMin_);
+
+    correctNut();
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace RASModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/TurbulenceModels/turbulenceModels/RAS/RNGkEpsilon/RNGkEpsilon.H

@@ -0,0 +1,221 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::RASModels::RNGkEpsilon
+
+Group
+    grpRASTurbulence
+
+Description
+    Renormalization group k-epsilon turbulence model for incompressible and
+    compressible flows.
+
+    Reference:
+    \verbatim
+        Yakhot, V. S. A. S. T. B. C. G., Orszag, S. A., Thangam, S.,
+        Gatski, T. B., & Speziale, C. G. (1992).
+        Development of turbulence models for shear flows
+        by a double expansion technique.
+        Physics of Fluids A: Fluid Dynamics (1989-1993), 4(7), 1510-1520.
+
+    For the RDT-based compression term:
+        El Tahry, S. H. (1983).
+        k-epsilon equation for compressible reciprocating engine flows.
+        Journal of Energy, 7(4), 345-353.
+    \endverbatim
+
+    The default model coefficients correspond to the following:
+    \verbatim
+        RNGkEpsilonCoeffs
+        {
+            Cmu         0.0845;
+            C1          1.42;
+            C2          1.68;
+            C3          -0.33;
+            sigmak      0.71942;
+            sigmaEps    0.71942;
+            eta0        4.38;
+            beta        0.012;
+        }
+    \endverbatim
+
+SourceFiles
+    RNGkEpsilon.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef RNGkEpsilon_H
+#define RNGkEpsilon_H
+
+#include "RASModel.H"
+#include "eddyViscosity.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace RASModels
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class RNGkEpsilon Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class BasicTurbulenceModel>
+class RNGkEpsilon
+:
+    public eddyViscosity<RASModel<BasicTurbulenceModel> >
+{
+    // Private Member Functions
+
+        // Disallow default bitwise copy construct and assignment
+        RNGkEpsilon(const RNGkEpsilon&);
+        RNGkEpsilon& operator=(const RNGkEpsilon&);
+
+
+protected:
+
+    // Protected data
+
+        // Model coefficients
+
+            dimensionedScalar Cmu_;
+            dimensionedScalar C1_;
+            dimensionedScalar C2_;
+            dimensionedScalar C3_;
+            dimensionedScalar sigmak_;
+            dimensionedScalar sigmaEps_;
+            dimensionedScalar eta0_;
+            dimensionedScalar beta_;
+
+
+        // Fields
+
+            volScalarField k_;
+            volScalarField epsilon_;
+
+
+    // Protected Member Functions
+
+        virtual void correctNut();
+        virtual tmp<fvScalarMatrix> kSource() const;
+        virtual tmp<fvScalarMatrix> epsilonSource() const;
+
+
+public:
+
+    typedef typename BasicTurbulenceModel::alphaField alphaField;
+    typedef typename BasicTurbulenceModel::rhoField rhoField;
+    typedef typename BasicTurbulenceModel::transportModel transportModel;
+
+
+    //- Runtime type information
+    TypeName("RNGkEpsilon");
+
+
+    // Constructors
+
+        //- Construct from components
+        RNGkEpsilon
+        (
+            const alphaField& alpha,
+            const rhoField& rho,
+            const volVectorField& U,
+            const surfaceScalarField& alphaRhoPhi,
+            const surfaceScalarField& phi,
+            const transportModel& transport,
+            const word& propertiesName = turbulenceModel::propertiesName,
+            const word& type = typeName
+        );
+
+
+    //- Destructor
+    virtual ~RNGkEpsilon()
+    {}
+
+
+    // Member Functions
+
+        //- Re-read model coefficients if they have changed
+        virtual bool read();
+
+        //- Return the effective diffusivity for k
+        tmp<volScalarField> DkEff() const
+        {
+            return tmp<volScalarField>
+            (
+                new volScalarField
+                (
+                    "DkEff",
+                    (this->nut_/sigmak_ + this->nu())
+                )
+            );
+        }
+
+        //- Return the effective diffusivity for epsilon
+        tmp<volScalarField> DepsilonEff() const
+        {
+            return tmp<volScalarField>
+            (
+                new volScalarField
+                (
+                    "DepsilonEff",
+                    (this->nut_/sigmaEps_ + this->nu())
+                )
+            );
+        }
+
+        //- Return the turbulence kinetic energy
+        virtual tmp<volScalarField> k() const
+        {
+            return k_;
+        }
+
+        //- Return the turbulence kinetic energy dissipation rate
+        virtual tmp<volScalarField> epsilon() const
+        {
+            return epsilon_;
+        }
+
+        //- Solve the turbulence equations and correct the turbulence viscosity
+        virtual void correct();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace RASModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+#   include "RNGkEpsilon.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/TurbulenceModels/turbulenceModels/RAS/kEpsilon/kEpsilon.C

@@ -245,7 +245,6 @@ void kEpsilon<BasicTurbulenceModel>::correct()
     (
         fvm::ddt(alpha, rho, epsilon_)
       + fvm::div(alphaRhoPhi, epsilon_)
-      - fvm::Sp(fvc::ddt(alpha, rho) + fvc::div(alphaRhoPhi), epsilon_)
       - fvm::laplacian(alpha*rho*DepsilonEff(), epsilon_)
      ==
         C1_*alpha*rho*G*epsilon_/k_
@@ -268,7 +267,6 @@ void kEpsilon<BasicTurbulenceModel>::correct()
     (
         fvm::ddt(alpha, rho, k_)
       + fvm::div(alphaRhoPhi, k_)
-      - fvm::Sp(fvc::ddt(alpha, rho) + fvc::div(alphaRhoPhi), k_)
       - fvm::laplacian(alpha*rho*DkEff(), k_)
      ==
         alpha*rho*G