dynamicLagrangian.H
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23 
24 Class
25  Foam::LESModels::dynamicLagrangian
26 
27 Group
28  grpLESTurbulence
29 
30 Description
31  Dynamic SGS model with Lagrangian averaging
32 
33  Reference:
34  \verbatim
35  Meneveau, C., Lund, T. S., & Cabot, W. H. (1996).
36  A Lagrangian dynamic subgrid-scale model of turbulence.
37  Journal of Fluid Mechanics, 319, 353-385.
38  \endverbatim
39 
40 SourceFiles
41  dynamicLagrangian.C
42 
43 \*---------------------------------------------------------------------------*/
44 
45 #ifndef dynamicLagrangian_H
46 #define dynamicLagrangian_H
47 
48 #include "LESeddyViscosity.H"
49 #include "simpleFilter.H"
50 
51 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
52 
53 namespace Foam
54 {
55 namespace LESModels
56 {
57 
58 /*---------------------------------------------------------------------------*\
59  Class dynamicLagrangian Declaration
60 \*---------------------------------------------------------------------------*/
61 
62 template<class BasicTurbulenceModel>
64 :
65  public LESeddyViscosity<BasicTurbulenceModel>
66 {
67  // Private Member Functions
68 
69  // Disallow default bitwise copy construct and assignment
71  dynamicLagrangian& operator=(const dynamicLagrangian&);
72 
73 
74 protected:
75 
76  // Protected data
77 
80 
82 
86 
89 
90 
91  // Protected Member Functions
92 
93  //- Update sub-grid eddy-viscosity
94  void correctNut(const tmp<volTensorField>& gradU);
95 
96  virtual void correctNut();
97 
98 
99 public:
101  typedef typename BasicTurbulenceModel::alphaField alphaField;
102  typedef typename BasicTurbulenceModel::rhoField rhoField;
103  typedef typename BasicTurbulenceModel::transportModel transportModel;
104 
105  //- Runtime type information
106  TypeName("dynamicLagrangian");
107 
108 
109  // Constructors
110 
111  //- Construct from components
113  (
114  const alphaField& alpha,
115  const rhoField& rho,
116  const volVectorField& U,
117  const surfaceScalarField& alphaRhoPhi,
118  const surfaceScalarField& phi,
119  const transportModel& transport,
120  const word& propertiesName = turbulenceModel::propertiesName,
121  const word& type = typeName
122  );
123 
124 
125  //- Destructor
126  virtual ~dynamicLagrangian()
127  {}
128 
129 
130  // Member Functions
131 
132  //- Read model coefficients if they have changed
133  virtual bool read();
134 
135  //- Return SGS kinetic energy
136  tmp<volScalarField> k(const tmp<volTensorField>& gradU) const
137  {
138  return
139  pow(2.0*flm_/fmm_, 2.0/3.0)
140  * pow(this->Ce_, -2.0/3.0)
141  * sqr(this->delta())*magSqr(dev(symm(gradU)));
142  }
143 
144  //- Return SGS kinetic energy
145  virtual tmp<volScalarField> k() const
146  {
147  return k(fvc::grad(this->U_));
148  }
149 
150  //- Return the effective diffusivity for k
151  tmp<volScalarField> DkEff() const
152  {
153  return tmp<volScalarField>
154  (
155  new volScalarField("DkEff", this->nut_ + this->nu())
156  );
157  }
158 
159  //- Correct Eddy-Viscosity and related properties
160  virtual void correct();
161 };
162 
163 
164 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
165 
166 } // End namespace LESModels
167 } // End namespace Foam
168 
169 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
170 
171 #ifdef NoRepository
172 # include "dynamicLagrangian.C"
173 #endif
174 
175 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
176 
177 #endif
178 
179 // ************************************************************************* //
dimensionedScalar pow(const dimensionedScalar &ds, const dimensionedScalar &expt)
virtual ~dynamicLagrangian()
Destructor.
dimensioned< scalar > magSqr(const dimensioned< Type > &)
A class for handling words, derived from string.
Definition: word.H:59
Namespace for OpenFOAM.
BasicTurbulenceModel::alphaField alphaField
dimensionedSymmTensor dev(const dimensionedSymmTensor &dt)
virtual bool read()
Read model coefficients if they have changed.
GeometricField< scalar, fvPatchField, volMesh > volScalarField
Definition: volFieldsFwd.H:52
Abstract class for LES filters.
Definition: LESfilter.H:54
const dimensionedScalar alpha
Fine-structure constant: default SI units: [].
const volScalarField & delta() const
Access function to filter width.
Definition: LESModel.H:195
fileName::Type type(const fileName &)
Return the file type: DIRECTORY or FILE.
Definition: POSIX.C:589
Simple top-hat filter used in dynamic LES models.
Definition: simpleFilter.H:50
surfaceScalarField & phi
TypeName("dynamicLagrangian")
Runtime type information.
tmp< volScalarField > DkEff() const
Return the effective diffusivity for k.
virtual tmp< volScalarField > k() const
Return SGS kinetic energy.
static const word propertiesName
Default name of the turbulence properties dictionary.
volScalarField & nu
tmp< GeometricField< typename outerProduct< vector, Type >::type, fvPatchField, volMesh >> grad(const GeometricField< Type, fvsPatchField, surfaceMesh > &ssf)
Definition: fvcGrad.C:52
Eddy viscosity LES SGS model base class.
dimensionedSymmTensor symm(const dimensionedSymmTensor &dt)
BasicTurbulenceModel::transportModel transportModel
dimensionedSymmTensor sqr(const dimensionedVector &dv)
Dynamic SGS model with Lagrangian averaging.
An auto-pointer similar to the STL auto_ptr but with automatic casting to a reference to the type and...
Definition: PtrList.H:117
A class for managing temporary objects.
Definition: PtrList.H:118
virtual void correct()
Correct Eddy-Viscosity and related properties.
U
Definition: pEqn.H:82
BasicTurbulenceModel::rhoField rhoField