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twophasekEpsilon.H
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twophasekEpsilon.H
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/*---------------------------------------------------------------------------*\
Copyright (C) 2015 Cyrille Bonamy, Julien Chauchat, Tian-Jian Hsu
and contributors
License
This file is part of SedFOAM.
SedFOAM 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.
SedFOAM 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 SedFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::RASModels::twophasekEpsilon
Group
grpRASTurbulence
Description
k-epsilon turbulence model for incompressible two phase flows.
Reference:
\verbatim
Original model:
Launder, B. E., & Spalding, D. B. (1972).
Lectures in mathematical models of turbulence.
Launder, B. E., & Spalding, D. B. (1974).
The numerical computation of turbulent flows.
Computer methods in applied mechanics and engineering,
3(2), 269-289.
Two-phase adaptation
Hsu, T.-J., Jenkins, J. T., and Liu, P. L.-F. (2004).
On two-phase sediment transport: sheet flow of massive particles.
Proceedings of the Royal Society London A, 460, 2223-2250.
Yu, X., Hsu, T.-J., and Hanes, D. M. (2010).
Sediment transport under wave groups: Relative importance between
nonlinear waveshape and nonlinear boundary layer streaming.
Journal of Geophysical Research, 115, C02013.
\endverbatim
The default model coefficients correspond to the following:
\verbatim
twophasekEpsilonCoeffs
{
Cmu 0.09;
C1 1.44;
C2 1.92;
C3ep 1.2;
C4ep 1.0;
alphak 1.0;
alphaEps 1.3;
KE2 1.0;
KE4 1.0;
}
\endverbatim
This file is in the \dir turbulenceModels/RAS/twophasekEpsilon subdirectory
inside the \dir turbulenceModels/RAS subdirectory
inside the \dir turbulenceModels subdirectory
SourceFiles
twophasekEpsilon.C
\*---------------------------------------------------------------------------*/
#ifndef twophasekEpsilon_H
#define twophasekEpsilon_H
#include "RASModel.H"
#include "eddyViscosity.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace RASModels
{
/*---------------------------------------------------------------------------*\
Class twophasekEpsilon Declaration
\*---------------------------------------------------------------------------*/
template<class BasicTurbulenceModel>
class twophasekEpsilon
:
public eddyViscosity<RASModel<BasicTurbulenceModel>>
{
protected:
// Protected data
// Model coefficients
Switch writeTke_;
dimensionedScalar C3ep_;
dimensionedScalar C4ep_;
dimensionedScalar KE2_;
dimensionedScalar KE4_;
dimensionedScalar Cmu_;
dimensionedScalar C1_;
dimensionedScalar C2_;
dimensionedScalar nutMax_;
dimensionedScalar alphak_;
dimensionedScalar alphaEps_;
// two phase information
const volScalarField& tmfexp_;
const volScalarField& ESD3_;
const volScalarField& ESD4_;
const volScalarField& ESD5_;
const volScalarField& ESD_;
// Fields
volScalarField k_;
volScalarField epsilon_;
// Protected Member Functions
virtual void correctNut();
public:
typedef typename BasicTurbulenceModel::alphaField alphaField;
typedef typename BasicTurbulenceModel::rhoField rhoField;
typedef typename BasicTurbulenceModel::transportModel transportModel;
//- Runtime type information
TypeName("twophasekEpsilon");
// Constructors
//- Construct from components
twophasekEpsilon
(
const alphaField& beta,
const rhoField& rho,
const volVectorField& U,
const surfaceScalarField& betaRhoPhi,
const surfaceScalarField& phi,
const transportModel& transport,
const word& propertiesName = turbulenceModel::propertiesName,
const word& type = typeName
);
//- Destructor
virtual ~twophasekEpsilon()
{}
// Member Functions
//- Read RASProperties dictionary
virtual bool read();
//- Return the effective diffusivity for k
tmp<volScalarField> DkEff() const
{
return tmp<volScalarField>
(
new volScalarField("DkEff", this->nut_ + this->nu())
);
}
//- Return the effective diffusivity for epsilon
tmp<volScalarField> DepsilonEff() const
{
return tmp<volScalarField>
(
new volScalarField
(
"DepsilonEff", this->nut_/alphaEps_ + 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_;
}
virtual tmp<volScalarField> omega() const
{
return tmp<volScalarField>
(
new volScalarField
(
IOobject
(
"omega",
this->mesh_.time().timeName(),
this->mesh_
),
epsilon_/(Cmu_*k_),
epsilon_.boundaryField().types()
)
);
}
virtual tmp<volScalarField> tmf() const
{
return Foam::exp(Cmu_*tmfexp_*omega());
}
virtual tmp<volScalarField> ESD2() const
{
return ESD3_*(1.0-tmf());
}
//- Solve the turbulence equations and correct the turbulence viscosity
virtual void correct();
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace RASModels
} // End namespace Foam
#ifdef NoRepository
#include "twophasekEpsilon.C"
#endif
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //