/usr/include/freefoam/incompressibleLESModels/dynOneEqEddy.H is in libfreefoam-dev 0.1.0+dfsg-1build1.
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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
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\\/ M anipulation |
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License
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under the terms of the GNU General Public License as published by
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Class
Foam::incompressible::LESModels::dynOneEqEddy
Description
One Equation Eddy Viscosity Model for incompressible flows.
Eddy viscosity SGS model using a modeled balance equation to simulate
the behaviour of k.
Thus
@verbatim
d/dt(k) + div(U*k) - div(nuSgs*grad(k))
=
-B*L - ce*k^3/2/delta
and
B = 2/3*k*I - 2*nuSgs*dev(D)
Beff = 2/3*k*I - 2*nuEff*dev(D)
where
D = symm(grad(U));
nuSgs = ck*sqrt(k)*delta
nuEff = nuSgs + nu
@endverbatim
SourceFiles
dynOneEqEddy.C
\*---------------------------------------------------------------------------*/
#ifndef dynOneEqEddy_H
#define dynOneEqEddy_H
#include <incompressibleLESModels/GenEddyVisc.H>
#include <LESfilters/LESfilter.H>
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace incompressible
{
namespace LESModels
{
/*---------------------------------------------------------------------------*\
Class dynOneEqEddy Declaration
\*---------------------------------------------------------------------------*/
class dynOneEqEddy
:
public GenEddyVisc
{
// Private data
volScalarField k_;
autoPtr<LESfilter> filterPtr_;
LESfilter& filter_;
// Private Member Functions
//- Update sub-grid scale fields
void updateSubGridScaleFields(const volSymmTensorField& D);
//- Calculate ck, ce by filtering the velocity field U.
dimensionedScalar ck(const volSymmTensorField& D) const;
dimensionedScalar ce(const volSymmTensorField& D) const;
// Disallow default bitwise copy construct and assignment
dynOneEqEddy(const dynOneEqEddy&);
dynOneEqEddy& operator=(const dynOneEqEddy&);
public:
//- Runtime type information
TypeName("dynOneEqEddy");
// Constructors
//- Construct from components
dynOneEqEddy
(
const volVectorField& U,
const surfaceScalarField& phi,
transportModel& transport
);
//- Destructor
virtual ~dynOneEqEddy()
{}
// Member Functions
//- Return SGS kinetic energy
virtual tmp<volScalarField> k() const
{
return k_;
}
//- Return the effective diffusivity for k
tmp<volScalarField> DkEff() const
{
return tmp<volScalarField>
(
new volScalarField("DkEff", 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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