/usr/include/freefoam/incompressibleLESModels/LRRDiffStress.H is in libfreefoam-dev 0.1.0+dfsg-1build1.
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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
\\/ M anipulation |
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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.
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Class
Foam::incompressible::LESModels::LRRDiffStress
Description
Differential SGS Stress Equation Model for incompressible flows.
The DSEM uses a model version of the full balance equation for the SGS
stress tensor to simulate the behaviour of B, hence,
@verbatim
d/dt(B) + div(U*B) - div(nuSgs*grad(B))
=
P - c1*e/k*B - 0.667*(1 - c1)*e*I - c2*(P - 0.333*trP*I)
where
k = 0.5*trB,
epsilon = ce*k^3/2/delta
epsilon/k = ce*k^1/2/delta
P = -(B'L + L'B)
nuEff = ck*sqrt(k)*delta + nu
@endverbatim
This version from Launder, Rece & Rodi 1975
SourceFiles
LRRDiffStress.C
\*---------------------------------------------------------------------------*/
#ifndef LRRDiffStress_H
#define LRRDiffStress_H
#include <incompressibleLESModels/GenSGSStress.H>
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace incompressible
{
namespace LESModels
{
/*---------------------------------------------------------------------------*\
Class LRRDiffStress Declaration
\*---------------------------------------------------------------------------*/
class LRRDiffStress
:
public GenSGSStress
{
// Private data
dimensionedScalar ck_;
dimensionedScalar c1_;
dimensionedScalar c2_;
// Private Member Functions
//- Update sub-grid scale fields
void updateSubGridScaleFields(const volScalarField& K);
// Disallow default bitwise copy construct and assignment
LRRDiffStress(const LRRDiffStress&);
LRRDiffStress& operator=(const LRRDiffStress&);
public:
//- Runtime type information
TypeName("LRRDiffStress");
// Constructors
//- Construct from components
LRRDiffStress
(
const volVectorField& U,
const surfaceScalarField& phi,
transportModel& transport
);
//- Destructor
virtual ~LRRDiffStress()
{}
// Member Functions
//- Return the effective diffusivity for B
tmp<volScalarField> DBEff() const
{
return tmp<volScalarField>
(
new volScalarField("DBEff", nuSgs_ + nu())
);
}
//- Correct Eddy-Viscosity and related properties
virtual void correct(const tmp<volTensorField>& gradU);
//- Read LESProperties dictionary
virtual bool read();
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace LESModels
} // End namespace incompressible
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************ vim: set sw=4 sts=4 et: ************************ //
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