Public Types | Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
DeardorffDiffStress< BasicTurbulenceModel > Class Template Reference

Differential SGS Stress Equation Model for incompressible and compressible flows. More...

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Public Types

typedef BasicTurbulenceModel::alphaField alphaField
 
typedef BasicTurbulenceModel::rhoField rhoField
 
typedef BasicTurbulenceModel::transportModel transportModel
 
- Public Types inherited from ReynoldsStress< LESModel< BasicTurbulenceModel > >
typedef LESModel< BasicTurbulenceModel >::alphaField alphaField
 
typedef LESModel< BasicTurbulenceModel >::rhoField rhoField
 
typedef LESModel< BasicTurbulenceModel >::transportModel transportModel
 
- Public Types inherited from LESModel< BasicTurbulenceModel >
typedef BasicTurbulenceModel::alphaField alphaField
 
typedef BasicTurbulenceModel::rhoField rhoField
 
typedef BasicTurbulenceModel::transportModel transportModel
 

Public Member Functions

 TypeName ("DeardorffDiffStress")
 Runtime type information. More...
 
 DeardorffDiffStress (const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const transportModel &transport, const word &propertiesName=turbulenceModel::propertiesName, const word &type=typeName)
 Constructor from components. More...
 
virtual ~DeardorffDiffStress ()
 Destructor. More...
 
virtual bool read ()
 Read model coefficients if they have changed. More...
 
virtual tmp< volScalarFieldepsilon () const
 Return the turbulence kinetic energy dissipation rate. More...
 
virtual void correct ()
 Correct sub-grid stress, eddy-Viscosity and related properties. More...
 
- Public Member Functions inherited from ReynoldsStress< LESModel< BasicTurbulenceModel > >
 ReynoldsStress (const word &modelName, const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const transportModel &transport, const word &propertiesName)
 Construct from components. More...
 
virtual ~ReynoldsStress ()
 Destructor. More...
 
virtual tmp< volScalarFieldnut () const
 Return the turbulence viscosity. More...
 
virtual tmp< scalarFieldnut (const label patchi) const
 Return the turbulence viscosity on patch. More...
 
virtual tmp< volScalarFieldk () const
 Return the turbulence kinetic energy. More...
 
virtual tmp< volSymmTensorFieldR () const
 Return the Reynolds stress tensor. More...
 
virtual tmp< volSymmTensorFielddevRhoReff () const
 Return the effective stress tensor. More...
 
virtual tmp< fvVectorMatrixdivDevRhoReff (volVectorField &U) const
 Return the source term for the momentum equation. More...
 
virtual tmp< fvVectorMatrixdivDevRhoReff (const volScalarField &rho, volVectorField &U) const
 Return the source term for the momentum equation. More...
 
- Public Member Functions inherited from LESModel< BasicTurbulenceModel >
 TypeName ("LES")
 Runtime type information. More...
 
 declareRunTimeSelectionTable (autoPtr, LESModel, dictionary,( const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const transportModel &transport, const word &propertiesName ),(alpha, rho, U, alphaRhoPhi, phi, transport, propertiesName))
 
 LESModel (const word &type, const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const transportModel &transport, const word &propertiesName)
 Construct from components. More...
 
virtual ~LESModel ()
 Destructor. More...
 
virtual const dictionarycoeffDict () const
 Const access to the coefficients dictionary. More...
 
const dimensionedScalarkMin () const
 Return the lower allowable limit for k (default: SMALL) More...
 
dimensionedScalarkMin ()
 Allow kMin to be changed. More...
 
const volScalarFielddelta () const
 Access function to filter width. More...
 
virtual tmp< volScalarFieldnuEff () const
 Return the effective viscosity. More...
 
virtual tmp< scalarFieldnuEff (const label patchi) const
 Return the effective viscosity on patch. More...
 

Protected Member Functions

virtual void correctNut ()
 Update the eddy-viscosity. More...
 
- Protected Member Functions inherited from ReynoldsStress< LESModel< BasicTurbulenceModel > >
void boundNormalStress (volSymmTensorField &R) const
 
void correctWallShearStress (volSymmTensorField &R) const
 
- Protected Member Functions inherited from LESModel< BasicTurbulenceModel >
virtual void printCoeffs (const word &type)
 Print model coefficients. More...
 

Protected Attributes

dimensionedScalar Ck_
 
dimensionedScalar Cm_
 
dimensionedScalar Ce_
 
dimensionedScalar Cs_
 
- Protected Attributes inherited from ReynoldsStress< LESModel< BasicTurbulenceModel > >
dimensionedScalar couplingFactor_
 
volSymmTensorField R_
 
volScalarField nut_
 
- Protected Attributes inherited from LESModel< BasicTurbulenceModel >
dictionary LESDict_
 LES coefficients dictionary. More...
 
Switch turbulence_
 Turbulence on/off flag. More...
 
Switch printCoeffs_
 Flag to print the model coeffs at run-time. More...
 
dictionary coeffDict_
 Model coefficients dictionary. More...
 
dimensionedScalar kMin_
 Lower limit of k. More...
 
autoPtr< Foam::LESdeltadelta_
 Run-time selectable delta model. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from LESModel< BasicTurbulenceModel >
static autoPtr< LESModelNew (const alphaField &alpha, const rhoField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const transportModel &transport, const word &propertiesName=turbulenceModel::propertiesName)
 Return a reference to the selected LES model. More...
 

Detailed Description

template<class BasicTurbulenceModel>
class Foam::LESModels::DeardorffDiffStress< BasicTurbulenceModel >

Differential SGS Stress Equation Model for incompressible and compressible flows.

Reference:

    Deardorff, J. W. (1973).
    The use of subgrid transport equations in a three-dimensional model
    of atmospheric turbulence.
    Journal of Fluids Engineering, 95(3), 429-438.

This SGS model uses a full balance equation for the SGS stress tensor to simulate the behaviour of B.

This implementation is as described in the above paper except that the triple correlation model of Donaldson is replaced with the generalized gradient diffusion model of Daly and Harlow:

    Daly, B. J., & Harlow, F. H. (1970).
    Transport equations in turbulence.
    Physics of Fluids (1958-1988), 13(11), 2634-2649.

with the default value for the coefficient Cs of 0.25 from

    Launder, B. E., Reece, G. J., & Rodi, W. (1975).
    Progress in the development of a Reynolds-stress turbulence closure.
    Journal of fluid mechanics, 68(03), 537-566.
Source files

Definition at line 82 of file DeardorffDiffStress.H.

Member Typedef Documentation

typedef BasicTurbulenceModel::alphaField alphaField

Definition at line 113 of file DeardorffDiffStress.H.

typedef BasicTurbulenceModel::rhoField rhoField

Definition at line 114 of file DeardorffDiffStress.H.

typedef BasicTurbulenceModel::transportModel transportModel

Definition at line 115 of file DeardorffDiffStress.H.

Constructor & Destructor Documentation

DeardorffDiffStress ( const alphaField alpha,
const rhoField rho,
const volVectorField U,
const surfaceScalarField alphaRhoPhi,
const surfaceScalarField phi,
const transportModel transport,
const word propertiesName = turbulenceModel::propertiesName,
const word type = typeName 
)

Constructor from components.

Definition at line 51 of file DeardorffDiffStress.C.

virtual ~DeardorffDiffStress ( )
inlinevirtual

Member Function Documentation

void correctNut ( )
protectedvirtual

Update the eddy-viscosity.

Implements ReynoldsStress< LESModel< BasicTurbulenceModel > >.

Definition at line 38 of file DeardorffDiffStress.C.

References delta, k, and Foam::sqrt().

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TypeName ( "DeardorffDiffStress< BasicTurbulenceModel >"  )

Runtime type information.

bool read ( )
virtual

Read model coefficients if they have changed.

Implements ReynoldsStress< LESModel< BasicTurbulenceModel > >.

Definition at line 123 of file DeardorffDiffStress.C.

References Foam::read().

Referenced by DeardorffDiffStress< BasicTurbulenceModel >::~DeardorffDiffStress().

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tmp< volScalarField > epsilon ( ) const
virtual

Return the turbulence kinetic energy dissipation rate.

Definition at line 142 of file DeardorffDiffStress.C.

References delta, IOobject::groupName(), k, IOobject::NO_READ, IOobject::NO_WRITE, and Foam::sqrt().

Referenced by DeardorffDiffStress< BasicTurbulenceModel >::~DeardorffDiffStress().

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void correct ( )
virtual

Correct sub-grid stress, eddy-Viscosity and related properties.

Implements ReynoldsStress< LESModel< BasicTurbulenceModel > >.

Definition at line 165 of file DeardorffDiffStress.C.

References correct, Foam::fvm::ddt(), delta, Foam::fvm::div(), epsilon, Foam::fvc::grad(), Foam::I, k, Foam::fvm::laplacian(), nu, R, Foam::fvm::Sp(), Foam::sqrt(), Foam::symm(), and Foam::twoSymm().

Referenced by DeardorffDiffStress< BasicTurbulenceModel >::~DeardorffDiffStress().

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Member Data Documentation

dimensionedScalar Ck_
protected

Definition at line 99 of file DeardorffDiffStress.H.

dimensionedScalar Cm_
protected

Definition at line 100 of file DeardorffDiffStress.H.

dimensionedScalar Ce_
protected

Definition at line 101 of file DeardorffDiffStress.H.

dimensionedScalar Cs_
protected

Definition at line 102 of file DeardorffDiffStress.H.


The documentation for this class was generated from the following files: