FreeFOAM The Cross-Platform CFD Toolkit
Smagorinsky2.H
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23 
24 Class
25  Foam::incompressible::LESModels::Smagorinsky2
26 
27 Description
28  The Isochoric Smagorinsky Model for incompressible flows
29 
30  Algebraic eddy viscosity SGS model founded on the assumption that
31  local equilibrium prevails, hence
32  @verbatim
33  B = 2/3*k*I - 2*nuSgs*dev(D) - 2*cD2*delta*(D.dev(D));
34  Beff = 2/3*k*I - 2*nuEff*dev(D) - 2*cD2*delta*(D.dev(D));
35 
36  where
37 
38  D = symm(grad(U));
39  k = cI*delta^2*||D||^2
40  nuSgs = ck*sqrt(k)*delta
41  nuEff = nuSgs + nu
42  @endverbatim
43 
44 SourceFiles
45  Smagorinsky2.C
46 
47 \*---------------------------------------------------------------------------*/
48 
49 #ifndef Smagorinsky2_H
50 #define Smagorinsky2_H
51 
53 
54 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
55 
56 namespace Foam
57 {
58 namespace incompressible
59 {
60 namespace LESModels
61 {
62 
63 /*---------------------------------------------------------------------------*\
64  Class Smagorinsky2 Declaration
65 \*---------------------------------------------------------------------------*/
66 
68 :
69  public Smagorinsky
70 {
71  // Private data
72 
73  dimensionedScalar cD2_;
74 
75 
76  // Private Member Functions
77 
78  // Disallow default bitwise copy construct and assignment
79  Smagorinsky2(const Smagorinsky2&);
80  Smagorinsky2& operator=(const Smagorinsky2&);
81 
82 
83 public:
84 
85  //- Runtime type information
86  TypeName("Smagorinsky2");
87 
88 
89  // Constructors
90 
91  //- Construct from components
93  (
94  const volVectorField& U,
95  const surfaceScalarField& phi,
97  );
98 
99 
100  //- Destructor
101  virtual ~Smagorinsky2()
102  {}
103 
104 
105  // Member Functions
106 
107  //- Return B.
108  virtual tmp<volSymmTensorField> B() const;
109 
110  //- Returns div(B).
111  // This is the additional term due to the filtering of the NSE.
113 
114  //- Read LESProperties dictionary
115  virtual bool read();
116 };
117 
118 
119 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
120 
121 } // End namespace LESModels
122 } // End namespace incompressible
123 } // End namespace Foam
124 
125 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
126 
127 #endif
128 
129 // ************************ vim: set sw=4 sts=4 et: ************************ //