GEKO implements the Menter & Matyushenko (2025) generalized k-omega two-equation turbulence model with the support: More...

Inheritance diagram for GEKO< BasicTurbulenceModel >:

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Collaboration diagram for GEKO< BasicTurbulenceModel >:

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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 ("GEKO")
	Runtime type information. More...

	GEKO (const GEKO &)=delete
	No copy construct. More...

void	operator= (const GEKO &)=delete
	No copy assignment. More...

	GEKO (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	~GEKO ()=default
	Destructor. More...

virtual tmp< volScalarField >	k () const
	Return the turbulence kinetic energy field [m^2/s^2]. More...

virtual tmp< volScalarField >	omega () const
	Return the specific dissipation rate field [1/s]. More...

virtual tmp< volSymmTensorField >	R () const
	Return the Reynolds stress tensor; optional dilatation corr term. More...

tmp< volScalarField >	DkEff (const volScalarField &sigmaK) const
	Return the effective diffusivity for k. More...

tmp< volScalarField >	DomegaEff (const volScalarField &sigmaOmega) const
	Return the effective diffusivity for omega. More...

virtual void	correct ()
	Solve the turbulence equations and correct the turbulence viscosity. More...

virtual bool	read ()
	Re-read model coefficients if they have changed. 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 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 noexcept
	Return the lower allowable limit for k (default: SMALL) More...

const dimensionedScalar &	epsilonMin () const noexcept
	Return the lower allowable limit for epsilon (default: SMALL) More...

const dimensionedScalar &	omegaMin () const noexcept
	Return the lower allowable limit for omega (default: SMALL) More...

dimensionedScalar &	kMin () noexcept
	Allow kMin to be changed. More...

dimensionedScalar &	epsilonMin () noexcept
	Allow epsilonMin to be changed. More...

dimensionedScalar &	omegaMin () noexcept
	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...

virtual tmp< volScalarField >	epsilon () const
	Return the turbulence kinetic energy dissipation rate. More...

Public Member Functions inherited from RASModelBase
	ClassName ("RASModelBase")
	Runtime type information. More...

	RASModelBase () noexcept=default
	Constructor. More...

virtual	~RASModelBase ()=default
	Destructor. 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...

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 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...

Detailed Description

template<class BasicTurbulenceModel>
class Foam::RASModels::GEKO< BasicTurbulenceModel >

GEKO implements the Menter & Matyushenko (2025) generalized k-omega two-equation turbulence model with the support:

Wall-distance-free functionality.
Production limiter and Kato-Launder stagnation correction.
Dilatation correction in the Reynolds stress tensor.
Machine-learning fields to support data-driven turbulence modelling.

Reference:

    Standard model (tag:MM):
        Menter, F. R., & Matyushenko, A. (2025).
        Generalized k−omega (GEKO) Two-Equation Turbulence Model.
        AIAA Journal, 63(11), 4590-4606.

Usage

Minimal example by using constant/turbulenceProperties - see the declaration content for the meaning of the entries:

RAS
{
    // Mandatory entries
    RASModel        GEKO;

    // Optional entries

    // Model switches
    wallDistanceFree        <bool>;
    productionLimiter       <bool>;
    katoLaunder             <bool>;
    dilatationCorrection    <bool>;
    writeCalibrationFields  <bool>;
    machineLearning         <bool>;

    // Main model coefficients for GEKO model
    Cmu             <scalar>;
    Comega2         <scalar>;
    sigmakTilde     <scalar>;
    sigmaOmegaTilde <scalar>;
    CRealize        <scalar>;

    // Auxiliary model coefficients for GEKO model
    kappa           <scalar>;
    CFbTurb         <scalar>;
    CFbLam          <scalar>;
    Aplus           <scalar>;
    Cc1             <scalar>;
    Cc2             <scalar>;
    CPKlim          <scalar>;

    // GEKO model coefficients
    Csep            <scalar>;
    Cnw             <scalar>;
    Cmix            <scalar>;
    Cjet            <scalar>;

    // Inherited entries
    ...
}

Mandatory input fields:

  Name    | Type            | Description               | Units
  k       | volScalarField  | Turbulent kinetic energy  | m^2/s^2
  omega   | volScalarField  | Specific dissipation rate | 1/s

Optional input fields:

  Name    | Type            | Description               | Units
  CSEP    | volScalarField  | Calibration for flow separation  | -
  CNW     | volScalarField  | Calibration for near-wall flows | -
  CMIX    | volScalarField  | Calibration for free-shear flows | -
  CJET    | volScalarField  | Calibration for jet flows | -

The inherited entries are elaborated in:

Source files

Definition at line 133 of file GEKO.H.

Member Typedef Documentation

◆ alphaField

typedef BasicTurbulenceModel::alphaField alphaField

Definition at line 324 of file GEKO.H.

◆ rhoField

typedef BasicTurbulenceModel::rhoField rhoField

Definition at line 325 of file GEKO.H.

◆ transportModel

typedef BasicTurbulenceModel::transportModel transportModel

Definition at line 326 of file GEKO.H.

Constructor & Destructor Documentation

◆ GEKO() [1/2]

GEKO ( const GEKO< BasicTurbulenceModel > & )

delete

No copy construct.

◆ GEKO() [2/2]

GEKO	(	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`
	)