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qZeta Class Reference

Gibson and Dafa'Alla's q-zeta two-equation low-Re turbulence model for incompressible flows. More...

#include <qZeta.H>

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Public Member Functions

 TypeName ("qZeta")
 Runtime type information.
 qZeta (const geometricOneField &alpha, const geometricOneField &rho, const volVectorField &U, const surfaceScalarField &alphaRhoPhi, const surfaceScalarField &phi, const transportModel &transport, const word &propertiesName=turbulenceModel::propertiesName, const word &type=typeName)
 Construct from components.
virtual ~qZeta ()=default
 Destructor.
virtual bool read ()
 Re-read model coefficients if they have changed.
const dimensionedScalar & qMin () const
 Return the lower allowable limit for q (default: SMALL).
const dimensionedScalar & zetaMin () const
 Return the lower allowable limit for zeta (default: SMALL).
dimensionedScalar & qMin ()
 Allow qMin to be changed.
dimensionedScalar & zetaMin ()
 Allow zetaMin to be changed.
tmp< volScalarField > DqEff () const
 Return the effective diffusivity for q.
tmp< volScalarField > DzetaEff () const
 Return the effective diffusivity for epsilon.
virtual tmp< volScalarField > k () const
 Return the turbulence kinetic energy.
virtual tmp< volScalarField > epsilon () const
 Return the turbulence kinetic energy dissipation rate.
virtual const volScalarField & q () const
virtual const volScalarField & zeta () const
virtual void correct ()
 Solve the turbulence equations and correct the turbulence viscosity.
Public Member Functions inherited from eddyViscosity< incompressible::RASModel >
 eddyViscosity (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.
virtual ~eddyViscosity ()=default
 Destructor.
virtual tmp< volScalarField > nut () const
 Return the turbulence viscosity.
virtual tmp< volSymmTensorField > R () const
 Return the Reynolds stress tensor.
virtual void validate ()
 Validate the turbulence fields after construction.
Public Member Functions inherited from linearViscousStress< incompressible::RASModel >
 linearViscousStress (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.
virtual ~linearViscousStress ()=default
 Destructor.
virtual tmp< volSymmTensorField > devRhoReff () const
 Return the effective stress tensor.
virtual tmp< fvVectorMatrix > divDevRhoReff (volVectorField &U) const
 Return the source term for the momentum equation.

Protected Member Functions

tmp< volScalarField > fMu () const
tmp< volScalarField > f2 () const
virtual void correctNut ()

Protected Attributes

dimensionedScalar Cmu_
dimensionedScalar C1_
dimensionedScalar C2_
dimensionedScalar sigmaZeta_
Switch anisotropic_
dimensionedScalar qMin_
 Lower limit of q.
dimensionedScalar zetaMin_
 Lower limit of zeta.
volScalarField k_
volScalarField epsilon_
volScalarField q_
volScalarField zeta_
Protected Attributes inherited from eddyViscosity< incompressible::RASModel >
volScalarField nut_

Additional Inherited Members

Public Types inherited from eddyViscosity< incompressible::RASModel >
typedef incompressible::RASModel::alphaField alphaField
typedef incompressible::RASModel::rhoField rhoField
typedef incompressible::RASModel::transportModel transportModel
Public Types inherited from linearViscousStress< incompressible::RASModel >
typedef incompressible::RASModel::alphaField alphaField
typedef incompressible::RASModel::rhoField rhoField
typedef incompressible::RASModel::transportModel transportModel

Detailed Description

Gibson and Dafa'Alla's q-zeta two-equation low-Re turbulence model for incompressible flows.

This turbulence model is described in: 

    Dafa'Alla, A.A., Juntasaro, E. & Gibson, M.M. (1996).
    Calculation of oscillating boundary layers with the
    q-zeta turbulence model.
    Engineering Turbulence Modelling and Experiments 3:
    Proceedings of the Third International Symposium,
    Crete, Greece, May 27-29, 141.

which is a development of the original q-zeta model described in: 

    Gibson, M. M., & Dafa'Alla, A. A. (1995).
    Two-equation model for turbulent wall flow.
    AIAA journal, 33(8), 1514-1518.
Source files

Definition at line 72 of file qZeta.H.

Constructor & Destructor Documentation

◆ qZeta()

qZeta ( const geometricOneField & alpha,
const geometricOneField & rho,
const volVectorField & U,
const surfaceScalarField & alphaRhoPhi,
const surfaceScalarField & phi,
const transportModel & transport,
const word & propertiesName = turbulenceModel::propertiesName,
const word & type = typeName )

Construct from components.

Definition at line 75 of file qZeta.C.

References alpha, anisotropic_, Foam::bound(), C1_, C2_, Cmu_, eddyViscosity< incompressible::RASModel >::eddyViscosity(), epsilon_, Foam::GlobalIOList< Tuple2< scalar, vector > >::typeName, k_, phi, q_, qMin_, rho, sigmaZeta_, Foam::sqrt(), timeName, U, zeta_, and zetaMin_.

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◆ ~qZeta()

virtual ~qZeta ( )
virtualdefault

Destructor.

Member Function Documentation

◆ fMu()

tmp< volScalarField > fMu ( ) const
protected

Definition at line 42 of file qZeta.C.

References anisotropic_, Foam::exp(), k_, nu, Foam::pow3(), q_, Foam::sqr(), and zeta_.

Referenced by correctNut().

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◆ f2()

tmp< volScalarField > f2 ( ) const
protected

Definition at line 59 of file qZeta.C.

References Foam::exp(), k_, nu, q_, Foam::sqr(), and zeta_.

Referenced by correct().

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◆ correctNut()

void correctNut ( )
protectedvirtual

Implements eddyViscosity< incompressible::RASModel >.

Definition at line 66 of file qZeta.C.

References Cmu_, epsilon_, fMu(), k_, eddyViscosity< incompressible::RASModel >::nut_, and Foam::sqr().

Referenced by correct().

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◆ TypeName()

TypeName ( "qZeta" )

Runtime type information.

References alpha, Foam::GlobalIOList< Tuple2< scalar, vector > >::typeName, phi, turbulenceModel::propertiesName, rho, and U.

◆ read()

bool read ( )
virtual

Re-read model coefficients if they have changed.

Implements eddyViscosity< incompressible::RASModel >.

Definition at line 213 of file qZeta.C.

References anisotropic_, C1_, C2_, Cmu_, qMin_, eddyViscosity< BasicTurbulenceModel >::read(), sigmaZeta_, and zetaMin_.

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◆ qMin() [1/2]

const dimensionedScalar & qMin ( ) const
inline

Return the lower allowable limit for q (default: SMALL).

Definition at line 156 of file qZeta.H.

References qMin_.

◆ zetaMin() [1/2]

const dimensionedScalar & zetaMin ( ) const
inline

Return the lower allowable limit for zeta (default: SMALL).

Definition at line 164 of file qZeta.H.

References zetaMin_.

◆ qMin() [2/2]

dimensionedScalar & qMin ( )
inline

Allow qMin to be changed.

Definition at line 172 of file qZeta.H.

References qMin_.

◆ zetaMin() [2/2]

dimensionedScalar & zetaMin ( )
inline

Allow zetaMin to be changed.

Definition at line 180 of file qZeta.H.

References zetaMin_.

◆ DqEff()

tmp< volScalarField > DqEff ( ) const
inline

Return the effective diffusivity for q.

Definition at line 188 of file qZeta.H.

References nu, and eddyViscosity< incompressible::RASModel >::nut_.

Referenced by correct().

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◆ DzetaEff()

tmp< volScalarField > DzetaEff ( ) const
inline

Return the effective diffusivity for epsilon.

Definition at line 199 of file qZeta.H.

References nu, eddyViscosity< incompressible::RASModel >::nut_, and sigmaZeta_.

Referenced by correct().

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◆ k()

virtual tmp< volScalarField > k ( ) const
inlinevirtual

Return the turbulence kinetic energy.

Implements eddyViscosity< incompressible::RASModel >.

Definition at line 210 of file qZeta.H.

References k_.

◆ epsilon()

virtual tmp< volScalarField > epsilon ( ) const
inlinevirtual

Return the turbulence kinetic energy dissipation rate.

Definition at line 218 of file qZeta.H.

References epsilon_.

◆ q()

virtual const volScalarField & q ( ) const
inlinevirtual

Definition at line 223 of file qZeta.H.

References q_.

◆ zeta()

virtual const volScalarField & zeta ( ) const
inlinevirtual

Definition at line 228 of file qZeta.H.

References zeta_.

◆ correct()

void correct ( )
virtual

Solve the turbulence equations and correct the turbulence viscosity.

Implements eddyViscosity< incompressible::RASModel >.

Definition at line 233 of file qZeta.C.

References Foam::bound(), C1_, C2_, eddyViscosity< BasicTurbulenceModel >::correct(), correctNut(), Foam::fvm::ddt(), Foam::fvm::div(), DqEff(), DzetaEff(), epsilon_, f2(), Foam::fvc::grad(), k_, Foam::fvm::laplacian(), Foam::magSqr(), Foam::fvc::magSqrGradGrad(), nu, eddyViscosity< incompressible::RASModel >::nut_, q_, qMin_, tmp< T >::ref(), solve(), Foam::fvm::Sp(), Foam::sqr(), Foam::fvm::SuSp(), Foam::symm(), zeta_, and zetaMin_.

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Member Data Documentation

◆ Cmu_

dimensionedScalar Cmu_
protected

Definition at line 83 of file qZeta.H.

Referenced by correctNut(), qZeta(), and read().

◆ C1_

dimensionedScalar C1_
protected

Definition at line 84 of file qZeta.H.

Referenced by correct(), qZeta(), and read().

◆ C2_

dimensionedScalar C2_
protected

Definition at line 85 of file qZeta.H.

Referenced by correct(), qZeta(), and read().

◆ sigmaZeta_

dimensionedScalar sigmaZeta_
protected

Definition at line 86 of file qZeta.H.

Referenced by DzetaEff(), qZeta(), and read().

◆ anisotropic_

Switch anisotropic_
protected

Definition at line 87 of file qZeta.H.

Referenced by fMu(), qZeta(), and read().

◆ qMin_

dimensionedScalar qMin_
protected

Lower limit of q.

Definition at line 92 of file qZeta.H.

Referenced by correct(), qMin(), qMin(), qZeta(), and read().

◆ zetaMin_

dimensionedScalar zetaMin_
protected

Lower limit of zeta.

Definition at line 97 of file qZeta.H.

Referenced by correct(), qZeta(), read(), zetaMin(), and zetaMin().

◆ k_

volScalarField k_
protected

Definition at line 101 of file qZeta.H.

Referenced by correct(), correctNut(), f2(), fMu(), k(), and qZeta().

◆ epsilon_

volScalarField epsilon_
protected

Definition at line 102 of file qZeta.H.

Referenced by correct(), correctNut(), epsilon(), and qZeta().

◆ q_

volScalarField q_
protected

Definition at line 104 of file qZeta.H.

Referenced by correct(), f2(), fMu(), q(), and qZeta().

◆ zeta_

volScalarField zeta_
protected

Definition at line 105 of file qZeta.H.

Referenced by correct(), f2(), fMu(), qZeta(), and zeta().

The documentation for this class was generated from the following files:
  • src/TurbulenceModels/incompressible/turbulentTransportModels/RAS/qZeta/qZeta.H
  • src/TurbulenceModels/incompressible/turbulentTransportModels/RAS/qZeta/qZeta.C