Spalart-Allmaras one-transport-equation linear-eddy-viscosity turbulence closure model for incompressible and compressible external flows. More...
Public Types | |
typedef BasicTurbulenceModel::alphaField | alphaField |
typedef BasicTurbulenceModel::rhoField | rhoField |
typedef BasicTurbulenceModel::transportModel | transportModel |
Public Types inherited from eddyViscosity< RASModel< BasicTurbulenceModel > > | |
typedef RASModel< BasicTurbulenceModel > ::alphaField | alphaField |
typedef RASModel< BasicTurbulenceModel > ::rhoField | rhoField |
typedef RASModel< BasicTurbulenceModel > ::transportModel | transportModel |
Public Types inherited from linearViscousStress< RASModel< BasicTurbulenceModel > > | |
typedef RASModel< BasicTurbulenceModel > ::alphaField | alphaField |
typedef RASModel< BasicTurbulenceModel > ::rhoField | rhoField |
typedef RASModel< BasicTurbulenceModel > ::transportModel | transportModel |
Public Types inherited from RASModel< BasicTurbulenceModel > | |
typedef BasicTurbulenceModel::alphaField | alphaField |
typedef BasicTurbulenceModel::rhoField | rhoField |
typedef BasicTurbulenceModel::transportModel | transportModel |
Public Member Functions | |
TypeName ("SpalartAllmaras") | |
Runtime type information. More... | |
SpalartAllmaras (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) | |
Construct from components. More... | |
virtual | ~SpalartAllmaras ()=default |
Destructor. More... | |
virtual bool | read () |
Re-read model coefficients if they have changed. More... | |
tmp< volScalarField > | DnuTildaEff () const |
Return the effective diffusivity for nuTilda. More... | |
virtual tmp< volScalarField > | k () const |
Return the (estimated) turbulent kinetic energy. More... | |
virtual tmp< volScalarField > | epsilon () const |
Return the (estimated) turbulent kinetic energy dissipation rate. More... | |
virtual tmp< volScalarField > | omega () const |
Return the (estimated) specific dissipation rate. More... | |
virtual void | correct () |
Solve the turbulence equations and correct the turbulent viscosity. More... | |
Public Member Functions inherited from eddyViscosity< RASModel< BasicTurbulenceModel > > | |
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. More... | |
virtual | ~eddyViscosity ()=default |
Destructor. More... | |
virtual tmp< volScalarField > | nut () const |
Return the turbulence viscosity. More... | |
virtual tmp< scalarField > | nut (const label patchi) const |
Return the turbulence viscosity on patch. More... | |
virtual tmp< volSymmTensorField > | R () const |
Return the Reynolds stress tensor. More... | |
virtual void | validate () |
Validate the turbulence fields after construction. More... | |
Public Member Functions inherited from linearViscousStress< RASModel< BasicTurbulenceModel > > | |
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. More... | |
virtual | ~linearViscousStress ()=default |
Destructor. More... | |
virtual tmp< volSymmTensorField > | devRhoReff () const |
Return the effective stress tensor. More... | |
virtual tmp< volSymmTensorField > | devRhoReff (const volVectorField &U) const |
Return the effective stress tensor based on a given velocity field. More... | |
virtual tmp< fvVectorMatrix > | divDevRhoReff (volVectorField &U) const |
Return the source term for the momentum equation. More... | |
virtual tmp< fvVectorMatrix > | divDevRhoReff (const volScalarField &rho, volVectorField &U) const |
Return the source term for the momentum equation. More... | |
Public Member Functions inherited from RASModel< BasicTurbulenceModel > | |
TypeName ("RAS") | |
Runtime type information. More... | |
declareRunTimeSelectionTable (autoPtr, RASModel, 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)) | |
RASModel (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 | ~RASModel ()=default |
Destructor. More... | |
const dimensionedScalar & | kMin () const |
Return the lower allowable limit for k (default: SMALL) More... | |
const dimensionedScalar & | epsilonMin () const |
Return the lower allowable limit for epsilon (default: SMALL) More... | |
const dimensionedScalar & | omegaMin () const |
Return the lower allowable limit for omega (default: SMALL) More... | |
dimensionedScalar & | kMin () |
Allow kMin to be changed. More... | |
dimensionedScalar & | epsilonMin () |
Allow epsilonMin to be changed. More... | |
dimensionedScalar & | omegaMin () |
Allow omegaMin to be changed. More... | |
virtual const dictionary & | coeffDict () const |
Const access to the coefficients dictionary. More... | |
virtual tmp< volScalarField > | nuEff () const |
Return the effective viscosity. More... | |
virtual tmp< scalarField > | nuEff (const label patchi) const |
Return the effective viscosity on patch. More... | |
Protected Member Functions | |
tmp< volScalarField > | chi () const |
tmp< volScalarField > | fv1 (const volScalarField &chi) const |
tmp< volScalarField::Internal > | fv2 (const volScalarField::Internal &chi, const volScalarField::Internal &fv1) const |
tmp< volScalarField::Internal > | Stilda () const |
tmp< volScalarField::Internal > | fw (const volScalarField::Internal &Stilda) const |
virtual void | correctNut () |
Update nut with the latest available nuTilda. More... | |
Protected Member Functions inherited from RASModel< BasicTurbulenceModel > | |
virtual void | printCoeffs (const word &type) |
Print model coefficients. More... | |
RASModel (const RASModel &)=delete | |
No copy construct. More... | |
void | operator= (const RASModel &)=delete |
No copy assignment. More... | |
Protected Attributes | |
dimensionedScalar | sigmaNut_ |
dimensionedScalar | kappa_ |
dimensionedScalar | Cb1_ |
dimensionedScalar | Cb2_ |
dimensionedScalar | Cw1_ |
dimensionedScalar | Cw2_ |
dimensionedScalar | Cw3_ |
dimensionedScalar | Cv1_ |
dimensionedScalar | Cs_ |
volScalarField | nuTilda_ |
Modified kinematic viscosity [m2/s]. More... | |
const volScalarField::Internal & | y_ |
Wall distance. More... | |
Protected Attributes inherited from eddyViscosity< RASModel< BasicTurbulenceModel > > | |
volScalarField | nut_ |
Protected Attributes inherited from RASModel< BasicTurbulenceModel > | |
dictionary | RASDict_ |
RAS 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... | |
dimensionedScalar | epsilonMin_ |
Lower limit of epsilon. More... | |
dimensionedScalar | omegaMin_ |
Lower limit for omega. More... | |
Additional Inherited Members | |
Static Public Member Functions inherited from RASModel< BasicTurbulenceModel > | |
static autoPtr< RASModel > | New (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 RAS model. More... | |
Spalart-Allmaras one-transport-equation linear-eddy-viscosity turbulence closure model for incompressible and compressible external flows.
nuTilda | Modified kinematic viscosity [m2/s]
References:
Standard model: Spalart, P.R., & Allmaras, S.R. (1994). A one-equation turbulence model for aerodynamic flows. La Recherche Aerospatiale, 1, 5-21. Standard model without trip and ft2 terms (tag:R): Rumsey, C. (2020). The Spalart-Allmaras Turbulence Model. Spalart-Allmaras One-Equation Model without ft2 Term (SA-noft2). https://turbmodels.larc.nasa.gov/spalart.html#sanoft2 (Retrieved:12-01-2021). Estimation expression for k and epsilon (tag:B), Eq. 4.50: Bourgoin, A. (2019). Bathymetry induced turbulence modelling the Alderney Race site: regional approach with TELEMAC-LES. Normandie Université. Estimation expressions for omega (tag:P): Pope, S. B. (2000). Turbulent flows. Cambridge, UK: Cambridge Univ. Press DOI:10.1017/CBO9780511840531
constant/turbulenceProperties
: RAS { // Mandatory entries (unmodifiable) RASModel SpalartAllmaras; // Optional entries (runtime modifiable) turbulence on; printCoeffs on; SpalartAllmarasCoeffs { sigmaNut 0.66666; kappa 0.41; Cb1 0.1355; Cb2 0.622; Cw2 0.3; Cw3 2.0; Cv1 7.1; Cs 0.3; } }
ft2
term is not needed in the absence of the trip-term, hence ft2
term is also not implementated.Stilda
generation term should never be allowed to be zero or negative to avoid potential numerical issues and unphysical results for complex flows. To this end, a limiter proposed by Spalart (R:Note-1(b)) is applied onto Stilda
where Stilda
is clipped at Cs*Omega
with the default value of Cs=0.3
.k
, epsilon
or omega
. Nevertheless, these quantities can be estimated by using an approximate expressions for turbulent kinetic energy and dissipation rate reported in (B:Eq. 4.50).Definition at line 132 of file SpalartAllmaras.H.
typedef BasicTurbulenceModel::alphaField alphaField |
Definition at line 199 of file SpalartAllmaras.H.
typedef BasicTurbulenceModel::rhoField rhoField |
Definition at line 200 of file SpalartAllmaras.H.
typedef BasicTurbulenceModel::transportModel transportModel |
Definition at line 201 of file SpalartAllmaras.H.
SpalartAllmaras | ( | const alphaField & | alpha, |
const rhoField & | rho, | ||
const volVectorField & | U, | ||
const surfaceScalarField & | alphaRhoPhi, | ||
const surfaceScalarField & | phi, | ||
const transportModel & | transport, | ||
const word & | propertiesName = turbulenceModel::propertiesName , |
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const word & | type = typeName |
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) |
Construct from components.
Definition at line 146 of file SpalartAllmaras.C.
References Foam::type().
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Destructor.
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Definition at line 44 of file SpalartAllmaras.C.
References nu.
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Definition at line 52 of file SpalartAllmaras.C.
References Foam::pow3().
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Definition at line 64 of file SpalartAllmaras.C.
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Definition at line 74 of file SpalartAllmaras.C.
References Foam::fvc::grad(), Foam::mag(), Foam::max(), Foam::skew(), Foam::sqr(), and Foam::sqrt().
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Definition at line 99 of file SpalartAllmaras.C.
References g, Foam::max(), Foam::min(), Foam::pow(), Foam::pow6(), and Foam::sqr().
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Update nut with the latest available nuTilda.
Implements eddyViscosity< RASModel< BasicTurbulenceModel > >.
Definition at line 132 of file SpalartAllmaras.C.
References optionList::correct(), and options::New().
TypeName | ( | "SpalartAllmaras< BasicTurbulenceModel >" | ) |
Runtime type information.
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virtual |
Re-read model coefficients if they have changed.
Implements eddyViscosity< RASModel< BasicTurbulenceModel > >.
Definition at line 269 of file SpalartAllmaras.C.
References Foam::read(), dimensioned< Type >::readIfPresent(), and Foam::sqr().
tmp< volScalarField > DnuTildaEff | ( | ) | const |
Return the effective diffusivity for nuTilda.
Definition at line 292 of file SpalartAllmaras.C.
References tmp< T >::New(), and nu.
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virtual |
Return the (estimated) turbulent kinetic energy.
Implements eddyViscosity< RASModel< BasicTurbulenceModel > >.
Definition at line 303 of file SpalartAllmaras.C.
References Foam::cbrt(), Foam::fvc::grad(), IOobject::groupName(), Foam::mag(), tmp< T >::New(), Foam::sqrt(), and Foam::symm().
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Return the (estimated) turbulent kinetic energy dissipation rate.
Reimplemented from RASModel< BasicTurbulenceModel >.
Definition at line 326 of file SpalartAllmaras.C.
References Foam::dimLength, Foam::dimTime, IOobject::groupName(), k, tmp< T >::New(), Foam::pow(), Foam::sqr(), and Foam::sqrt().
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Return the (estimated) specific dissipation rate.
Reimplemented from RASModel< BasicTurbulenceModel >.
Definition at line 349 of file SpalartAllmaras.C.
References Foam::dimLength, Foam::dimTime, epsilon, IOobject::groupName(), k, tmp< T >::New(), and Foam::sqr().
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Solve the turbulence equations and correct the turbulent viscosity.
Implements eddyViscosity< RASModel< BasicTurbulenceModel > >.
Definition at line 370 of file SpalartAllmaras.C.
References Foam::constant::atomic::alpha, Foam::bound(), correct(), Foam::fvm::ddt(), Foam::fvm::div(), fvOptions, Foam::fvc::grad(), Foam::fvm::laplacian(), Foam::magSqr(), options::New(), tmp< T >::ref(), rho, Foam::solve(), Foam::fvm::Sp(), Foam::sqr(), and Foam::Zero.
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Definition at line 151 of file SpalartAllmaras.H.
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Definition at line 152 of file SpalartAllmaras.H.
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Definition at line 153 of file SpalartAllmaras.H.
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Definition at line 154 of file SpalartAllmaras.H.
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Definition at line 155 of file SpalartAllmaras.H.
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Definition at line 156 of file SpalartAllmaras.H.
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Definition at line 157 of file SpalartAllmaras.H.
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Definition at line 158 of file SpalartAllmaras.H.
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Definition at line 159 of file SpalartAllmaras.H.
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Modified kinematic viscosity [m2/s].
Definition at line 165 of file SpalartAllmaras.H.
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Wall distance.
Note: different to wall distance in parent RASModel which is for near-wall cells only
Definition at line 170 of file SpalartAllmaras.H.