1 /*---------------------------------------------------------------------------*\
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25 Foam::incompressible::LESModels::Smagorinsky
28 The Isochoric Smagorinsky Model for incompressible flows.
30 Algebraic eddy viscosity SGS model founded on the assumption that
31 local equilibrium prevails.
34 B = 2/3*k*I - 2*nuSgs*dev(D)
35 Beff = 2/3*k*I - 2*nuEff*dev(D)
40 k = (2*ck/ce)*delta^2*||D||^2
41 nuSgs = ck*sqrt(k)*delta
48 \*---------------------------------------------------------------------------*/
53 #include "GenEddyVisc.H"
55 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
59 namespace incompressible
64 /*---------------------------------------------------------------------------*\
65 Class Smagorinsky Declaration
66 \*---------------------------------------------------------------------------*/
74 dimensionedScalar ck_;
77 // Private Member Functions
79 //- Update sub-grid scale fields
80 void updateSubGridScaleFields(const volTensorField& gradU);
82 // Disallow default bitwise copy construct and assignment
83 Smagorinsky(const Smagorinsky&);
84 Smagorinsky& operator=(const Smagorinsky&);
89 //- Runtime type information
90 TypeName("Smagorinsky");
94 //- Construct from components
97 const volVectorField& U,
98 const surfaceScalarField& phi,
99 transportModel& transport,
100 const word& turbulenceModelName = turbulenceModel::typeName,
101 const word& modelName = typeName
106 virtual ~Smagorinsky()
112 //- Return SGS kinetic energy
113 // calculated from the given velocity gradient
114 tmp<volScalarField> k(const tmp<volTensorField>& gradU) const
116 return (2.0*ck_/ce_)*sqr(delta())*magSqr(dev(symm(gradU)));
119 //- Return SGS kinetic energy
120 virtual tmp<volScalarField> k() const
122 return k(fvc::grad(U()));
126 //- Correct Eddy-Viscosity and related properties
127 virtual void correct(const tmp<volTensorField>& gradU);
129 //- Read LESProperties dictionary
134 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
136 } // End namespace LESModels
137 } // End namespace incompressible
138 } // End namespace Foam
140 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
144 // ************************************************************************* //