FreeFOAM The Cross-Platform CFD Toolkit
oneEqEddy.H
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23 
24 Class
25  Foam::compressible::LESModels::oneEqEddy
26 
27 Description
28  One Equation Eddy Viscosity Model for incompressible flows
29 
30  Eddy viscosity SGS model using a modeled balance equation to simulate the
31  behaviour of k, hence,
32  @verbatim
33  d/dt(rho*k) + div(rho*U*k) - div(muEff*grad(k))
34  =
35  -rho*D:B - ce*rho*k^3/2/delta
36 
37  and
38 
39  B = 2/3*k*I - 2*nuSgs*dev(D)
40 
41  where
42 
43  D = symm(grad(U));
44  muSgs = ck*rho*sqrt(k)*delta
45  @endverbatim
46 
47 
48 SourceFiles
49  oneEqEddy.C
50 
51 \*---------------------------------------------------------------------------*/
52 
53 #ifndef compressibleOneEqEddy_H
54 #define compressibleOneEqEddy_H
55 
57 
58 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
59 
60 namespace Foam
61 {
62 namespace compressible
63 {
64 namespace LESModels
65 {
66 
67 /*---------------------------------------------------------------------------*\
68  Class oneEqEddy Declaration
69 \*---------------------------------------------------------------------------*/
70 
71 class oneEqEddy
72 :
73  public GenEddyVisc
74 {
75  // Private data
76 
78 
79 
80  // Private Member Functions
81 
82  //- Update sub-grid scale fields
83  void updateSubGridScaleFields();
84 
85  // Disallow default bitwise copy construct and assignment
86  oneEqEddy(const oneEqEddy&);
87  oneEqEddy& operator=(const oneEqEddy&);
88 
89 
90 public:
91 
92  //- Runtime type information
93  TypeName("oneEqEddy");
94 
95 
96  // Constructors
97 
98  //- Constructor from components
99  oneEqEddy
100  (
101  const volScalarField& rho,
102  const volVectorField& U,
103  const surfaceScalarField& phi,
104  const basicThermo& thermoPhysicalModel
105  );
106 
107 
108  // Destructor
109  virtual ~oneEqEddy()
110  {}
111 
112 
113  // Member Functions
114 
115  //- Return the effective diffusivity for k
117  {
118  return tmp<volScalarField>
119  (
120  new volScalarField("DkEff", muSgs_ + mu())
121  );
122  }
123 
124  //- Correct Eddy-Viscosity and related properties
125  virtual void correct(const tmp<volTensorField>& gradU);
126 
127  //- Read LESProperties dictionary
128  virtual bool read();
129 };
130 
131 
132 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
133 
134 } // End namespace LESModels
135 } // End namespace compressible
136 } // End namespace Foam
137 
138 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
139 
140 #endif
141 
142 // ************************ vim: set sw=4 sts=4 et: ************************ //