1 /*---------------------------------------------------------------------------*\
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25 Foam::compressible::LESModels::GenEddyVisc
28 General base class for all compressible models that can be implemented as
29 an eddy viscosity, i.e. algebraic and one-equation models.
31 Contains fields for k (SGS turbulent kinetic energy), gamma
32 (modelled viscosity) and epsilon (SGS dissipation).
37 \*---------------------------------------------------------------------------*/
39 #ifndef compressibleGenEddyVisc_H
40 #define compressibleGenEddyVisc_H
44 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
48 namespace compressible
53 /*---------------------------------------------------------------------------*\
54 Class GenEddyVisc Declaration
55 \*---------------------------------------------------------------------------*/
59 virtual public LESModel
61 // Private Member Functions
63 // Disallow default bitwise copy construct and assignment
64 GenEddyVisc(const GenEddyVisc&);
65 GenEddyVisc& operator=(const GenEddyVisc&);
72 dimensionedScalar ce_;
73 dimensionedScalar Prt_;
79 volScalarField muSgs_;
80 volScalarField alphaSgs_;
87 //- Construct from components
90 const volScalarField& rho,
91 const volVectorField& U,
92 const surfaceScalarField& phi,
93 const basicThermo& thermoPhysicalModel
98 virtual ~GenEddyVisc()
104 //- Return SGS kinetic energy
105 virtual tmp<volScalarField> k() const
110 //- Return sub-grid disipation rate
111 virtual tmp<volScalarField> epsilon() const
113 return ce_*k_*sqrt(k_)/delta();
117 virtual tmp<volScalarField> muSgs() const
122 //- Return thermal diffusivity
123 virtual tmp<volScalarField> alphaSgs() const
128 //- Return thermal diffusivity
129 virtual tmp<volScalarField> alphaEff() const
131 return tmp<volScalarField>
133 new volScalarField("alphaEff", alphaSgs_ + alpha())
137 //- Return the sub-grid stress tensor.
138 virtual tmp<volSymmTensorField> B() const;
140 //- Return the deviatoric part of the effective sub-grid
141 // turbulence stress tensor including the laminar stress
142 virtual tmp<volSymmTensorField> devRhoBeff() const;
144 //- Returns div(rho*dev(B)).
145 // This is the additional term due to the filtering of the NSE.
146 virtual tmp<fvVectorMatrix> divDevRhoBeff(volVectorField& U) const;
148 //- Correct Eddy-Viscosity and related properties
149 virtual void correct(const tmp<volTensorField>& gradU);
151 //- Read LESProperties dictionary
156 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
158 } // End namespace LESModels
159 } // End namespace compressible
160 } // End namespace Foam
162 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
166 // ************************************************************************* //