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oneEqEddy.H

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00001 /*---------------------------------------------------------------------------*\
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00004    \\    /   O peration     |
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00008 License
00009     This file is part of OpenFOAM.
00010 
00011     OpenFOAM is free software; you can redistribute it and/or modify it
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00020 
00021     You should have received a copy of the GNU General Public License
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00023     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
00024 
00025 Class
00026     oneEqEddy
00027 
00028 Description
00029 <pre>
00030     One Equation Eddy Viscosity Model
00031     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00032     Eddy viscosity SGS model using a modeled balance equation to simulate the
00033     behaviour of k, hence,
00034 
00035         d/dt(rho*k) + div(rho*U*k) - div(muEff*grad(k))
00036         =
00037         -rho*B*L - ce*rho*k^3/2/delta
00038 
00039     and
00040 
00041         B = 2/3*k*I - 2*nuEff*dev(D)
00042 
00043     where
00044 
00045         D = symm(grad(U));
00046         muSgs = rho*ck*sqrt(k)*delta
00047         muEff = muSgs + mu
00048 </pre>
00049 
00050 SourceFiles
00051     oneEqEddy.C
00052 
00053 \*---------------------------------------------------------------------------*/
00054 
00055 #ifndef compressibleOneEqEddy_H
00056 #define compressibleOneEqEddy_H
00057 
00058 #include "GenEddyVisc.H"
00059 
00060 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00061 
00062 namespace Foam
00063 {
00064 namespace compressible
00065 {
00066 namespace LESmodels
00067 {
00068 
00069 /*---------------------------------------------------------------------------*\
00070                            Class oneEqEddy Declaration
00071 \*---------------------------------------------------------------------------*/
00072 
00073 class oneEqEddy
00074 :
00075     public GenEddyVisc
00076 {
00077     // Private data
00078 
00079         dimensionedScalar ck_;
00080 
00081 
00082     // Private Member Functions
00083 
00084         // Disallow default bitwise copy construct and assignment
00085         oneEqEddy(const oneEqEddy&);
00086         oneEqEddy& operator=(const oneEqEddy&);
00087 
00088 
00089 public:
00090 
00091     //- Runtime type information
00092     TypeName("oneEqEddy");
00093 
00094 
00095     // Constructors
00096 
00097         //- Constructor from components
00098         oneEqEddy
00099         (
00100             const volScalarField& rho,
00101             const volVectorField& U,
00102             const surfaceScalarField& phi,
00103             const basicThermo& thermoPhysicalModel
00104         );
00105 
00106 
00107     // Destructor
00108 
00109         ~oneEqEddy()
00110         {}
00111 
00112 
00113     // Member Functions
00114 
00115         //- Return the effective diffusivity for k
00116         tmp<volScalarField> DkEff() const
00117         {
00118             return tmp<volScalarField> 
00119             (
00120                 new volScalarField("DkEff", muSgs_ + mu())
00121             );
00122         }
00123 
00124         //- Correct Eddy-Viscosity and related properties
00125         void correct(const tmp<volTensorField>& gradU);
00126 
00127         //- Read turbulenceProperties dictionary
00128         bool read();
00129 };
00130 
00131 
00132 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00133 
00134 } // End namespace LESmodels
00135 } // End namespace compressible
00136 } // End namespace Foam
00137 
00138 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00139 
00140 #endif
00141 
00142 // ************************************************************************* //
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