This boundary condition provides a wall constraint on the turbulent viscosity, i.e. nut, based on velocity, i.e. U, using a binomial-function wall-function blending method between the viscous and inertial sublayer predictions of nut for low- and high-Reynolds number turbulence models. More...

Inheritance diagram for nutUBlendedWallFunctionFvPatchScalarField:

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Collaboration diagram for nutUBlendedWallFunctionFvPatchScalarField:

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Public Member Functions
	TypeName ("nutUBlendedWallFunction")
	Runtime type information. More...

	nutUBlendedWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &)
	Construct from patch and internal field. More...

	nutUBlendedWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &, const dictionary &)
	Construct from patch, internal field and dictionary. More...

	nutUBlendedWallFunctionFvPatchScalarField (const nutUBlendedWallFunctionFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)

	nutUBlendedWallFunctionFvPatchScalarField (const nutUBlendedWallFunctionFvPatchScalarField &)
	Construct as copy. More...

virtual tmp< fvPatchScalarField >	clone () const
	Construct and return a clone. More...

	nutUBlendedWallFunctionFvPatchScalarField (const nutUBlendedWallFunctionFvPatchScalarField &, const DimensionedField< scalar, volMesh > &)
	Construct as copy setting internal field reference. More...

virtual tmp< fvPatchScalarField >	clone (const DimensionedField< scalar, volMesh > &iF) const
	Construct and return a clone setting internal field reference. More...

virtual tmp< scalarField >	yPlus () const
	Calculate and return the yPlus at the boundary. More...

virtual void	write (Ostream &os) const
	Write. More...

Public Member Functions inherited from nutWallFunctionFvPatchScalarField
	TypeName ("nutWallFunction")
	Runtime type information. More...

	nutWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &)
	Construct from patch and internal field. More...

	nutWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &, const dictionary &)
	Construct from patch, internal field and dictionary. More...

	nutWallFunctionFvPatchScalarField (const nutWallFunctionFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)

	nutWallFunctionFvPatchScalarField (const nutWallFunctionFvPatchScalarField &)
	Construct as copy. More...

	nutWallFunctionFvPatchScalarField (const nutWallFunctionFvPatchScalarField &, const DimensionedField< scalar, volMesh > &)
	Construct as copy setting internal field reference. More...

scalar	Cmu () const
	Return Cmu. More...

scalar	kappa () const
	Return kappa. More...

scalar	E () const
	Return E. More...

scalar	yPlusLam () const
	Return the estimated y+ at the two-sublayer intersection. More...

scalar	blend (const scalar nutVis, const scalar nutLog, const scalar yPlus) const
	Return the blended nut according to the chosen blending treatment. More...

virtual void	updateCoeffs ()
	Update the coefficients associated with the patch field. More...

Protected Member Functions
virtual tmp< scalarField >	calcNut () const
	Calculate the turbulent viscosity. More...

virtual tmp< scalarField >	calcUTau (const scalarField &magGradU) const
	Calculate the friction velocity. More...

Protected Member Functions inherited from nutWallFunctionFvPatchScalarField
virtual const volVectorField &	U (const turbulenceModel &turb) const

virtual void	checkType ()
	Check the type of the patch. More...

virtual void	writeLocalEntries (Ostream &) const
	Write local wall function variables. More...

Protected Attributes
scalar	n_
	Model coefficient; default = 4. More...

Protected Attributes inherited from nutWallFunctionFvPatchScalarField
enum blendingType	blending_
	Blending treatment (default = blendingType::STEPWISE) More...

const scalar	n_

word	UName_
	Name of velocity field. More...

scalar	Cmu_
	Empirical model coefficient. More...

scalar	kappa_
	von Kármán constant More...

scalar	E_
	Wall roughness parameter. More...

scalar	yPlusLam_

Additional Inherited Members
Static Public Member Functions inherited from nutWallFunctionFvPatchScalarField
static const nutWallFunctionFvPatchScalarField &	nutw (const turbulenceModel &turbModel, const label patchi)
	Return the nut patchField for the given wall patch. More...

static scalar	yPlusLam (const scalar kappa, const scalar E)
	Estimate the y+ at the intersection of the two sublayers. More...

Protected Types inherited from nutWallFunctionFvPatchScalarField
enum	blendingType { STEPWISE, MAX, BINOMIAL, EXPONENTIAL }
	Options for the blending treatment of viscous and inertial sublayers. More...

Static Protected Attributes inherited from nutWallFunctionFvPatchScalarField
static const Enum< blendingType >	blendingTypeNames
	Names for blendingType. More...

Detailed Description

This boundary condition provides a wall constraint on the turbulent viscosity, i.e. nut, based on velocity, i.e. U, using a binomial-function wall-function blending method between the viscous and inertial sublayer predictions of nut for low- and high-Reynolds number turbulence models.

\[ u_\tau = (u_{\tau,v}^n + u_{\tau,l}^n)^{1/n} \]

where

\( u_\tau \)	=	Friction velocity
\( u_{\tau,v} \)	=	Friction velocity in the viscous sublayer
\( u_{\tau,l} \)	=	Friction velocity in the inertial sublayer

Reference:

        See the section that describes 'automatic wall treatment':
            Menter, F., Ferreira, J. C., Esch, T., Konno, B. (2003).
            The SST turbulence model with improved wall treatment
            for heat transfer predictions in gas turbines.
            In Proceedings of the International Gas Turbine Congress.
            November, 2003. Tokyo, Japan. pp. 2-7.

Usage

Example of the boundary condition specification:

<patchName>
{
    // Mandatory entries (unmodifiable)
    type            nutUBlendedWallFunction;

    // Optional entries (unmodifiable)
    n               4.0;

    // Optional (inherited) entries
    ...
 }

where the entries mean:

Property	Description	Type	Req'd	Dflt
`type`	Type name: nutUBlendedWallFunction	word	yes	-
`n`	Blending factor	scalar	no	4.0

The inherited entries are elaborated in:

nutWallFunctionFvPatchScalarField.H

Note

The full 'automatic wall treatment' description also requires use of the omegaWallFunctionFvPatchScalarField.H with the blending option binomial or with the deprecated blended flag set to on.
Suffers from non-exact restart since correctNut() (called through turbulence->validate) returns a slightly different value every time it is called. See nutUSpaldingWallFunctionFvPatchScalarField.C.

See also

Source files

Definition at line 147 of file nutUBlendedWallFunctionFvPatchScalarField.H.

Constructor & Destructor Documentation

◆ nutUBlendedWallFunctionFvPatchScalarField() [1/5]

nutUBlendedWallFunctionFvPatchScalarField	(	const fvPatch &	p,
		const DimensionedField< scalar, volMesh > &	iF
	)

Construct from patch and internal field.

Definition at line 125 of file nutUBlendedWallFunctionFvPatchScalarField.C.

Referenced by nutUBlendedWallFunctionFvPatchScalarField::clone().

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◆ nutUBlendedWallFunctionFvPatchScalarField() [2/5]

nutUBlendedWallFunctionFvPatchScalarField	(	const fvPatch &	p,
		const DimensionedField< scalar, volMesh > &	iF,
		const dictionary &	dict
	)

Construct from patch, internal field and dictionary.

Definition at line 151 of file nutUBlendedWallFunctionFvPatchScalarField.C.

◆ nutUBlendedWallFunctionFvPatchScalarField() [3/5]

nutUBlendedWallFunctionFvPatchScalarField	(	const nutUBlendedWallFunctionFvPatchScalarField &	ptf,
		const fvPatch &	p,
		const DimensionedField< scalar, volMesh > &	iF,
		const fvPatchFieldMapper &	mapper
	)

Construct by mapping given nutUBlendedWallFunctionFvPatchScalarField onto a new patch

Definition at line 137 of file nutUBlendedWallFunctionFvPatchScalarField.C.

◆ nutUBlendedWallFunctionFvPatchScalarField() [4/5]

nutUBlendedWallFunctionFvPatchScalarField ( const nutUBlendedWallFunctionFvPatchScalarField & wfpsf )

Construct as copy.

Definition at line 164 of file nutUBlendedWallFunctionFvPatchScalarField.C.

◆ nutUBlendedWallFunctionFvPatchScalarField() [5/5]

nutUBlendedWallFunctionFvPatchScalarField	(	const nutUBlendedWallFunctionFvPatchScalarField &	wfpsf,
		const DimensionedField< scalar, volMesh > &	iF
	)

Construct as copy setting internal field reference.

Definition at line 175 of file nutUBlendedWallFunctionFvPatchScalarField.C.

Member Function Documentation

◆ calcNut()

Foam::tmp< Foam::scalarField > calcNut ( ) const

protectedvirtual

Calculate the turbulent viscosity.

Implements nutWallFunctionFvPatchScalarField.

Definition at line 37 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References GeometricField< Type, PatchField, GeoMesh >::boundaryField(), nutUBlendedWallFunctionFvPatchScalarField::calcUTau(), Foam::constant::atomic::group, IOobject::groupName(), Foam::mag(), Foam::max(), turbulenceModel::nu(), Foam::foamVersion::patch, turbulenceModel::propertiesName, Foam::sqr(), and nutWallFunctionFvPatchScalarField::U().

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◆ calcUTau()

Foam::tmp< Foam::scalarField > calcUTau ( const scalarField & magGradU ) const

protectedvirtual

Calculate the friction velocity.

Definition at line 64 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References forAll, Foam::constant::atomic::group, IOobject::groupName(), Foam::log(), Foam::mag(), magUp, n, turbulenceModel::nu(), Foam::foamVersion::patch, fvPatchField< Type >::patchInternalField(), Foam::pow(), turbulenceModel::propertiesName, tmp< T >::ref(), Foam::sqrt(), U, y, turbulenceModel::y(), yPlus, and Foam::Zero.

Referenced by nutUBlendedWallFunctionFvPatchScalarField::calcNut().

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◆ TypeName()

TypeName ( "nutUBlendedWallFunction" )

Runtime type information.

◆ clone() [1/2]

virtual tmp<fvPatchScalarField> clone ( ) const

inlinevirtual

Construct and return a clone.

Definition at line 209 of file nutUBlendedWallFunctionFvPatchScalarField.H.

References nutUBlendedWallFunctionFvPatchScalarField::nutUBlendedWallFunctionFvPatchScalarField().

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◆ clone() [2/2]

virtual tmp<fvPatchScalarField> clone ( const DimensionedField< scalar, volMesh > & iF ) const

inlinevirtual

Construct and return a clone setting internal field reference.

Definition at line 226 of file nutUBlendedWallFunctionFvPatchScalarField.H.

References nutUBlendedWallFunctionFvPatchScalarField::nutUBlendedWallFunctionFvPatchScalarField().

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◆ yPlus()

Foam::tmp< Foam::scalarField > yPlus ( ) const

virtual

Calculate and return the yPlus at the boundary.

Implements nutWallFunctionFvPatchScalarField.

Definition at line 188 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References Foam::constant::atomic::group, IOobject::groupName(), Foam::mag(), turbulenceModel::nu(), Foam::foamVersion::patch, turbulenceModel::propertiesName, fvPatchField< Type >::snGrad(), U, y, and turbulenceModel::y().

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◆ write()

void write ( Ostream & os ) const

virtual

Write.

Reimplemented from nutWallFunctionFvPatchScalarField.

Definition at line 211 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References os(), fvPatchField< Type >::write(), and Ostream::writeEntry().

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Member Data Documentation

◆ n_

scalar n_

protected

Model coefficient; default = 4.

Definition at line 156 of file nutUBlendedWallFunctionFvPatchScalarField.H.

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

src/TurbulenceModels/turbulenceModels/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutUBlendedWallFunction/nutUBlendedWallFunctionFvPatchScalarField.H
src/TurbulenceModels/turbulenceModels/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutUBlendedWallFunction/nutUBlendedWallFunctionFvPatchScalarField.C

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ nutUBlendedWallFunctionFvPatchScalarField() [1/5]

◆ nutUBlendedWallFunctionFvPatchScalarField() [2/5]

◆ nutUBlendedWallFunctionFvPatchScalarField() [3/5]

◆ nutUBlendedWallFunctionFvPatchScalarField() [4/5]

◆ nutUBlendedWallFunctionFvPatchScalarField() [5/5]

Member Function Documentation

◆ calcNut()

◆ calcUTau()

◆ TypeName()

◆ clone() [1/2]

◆ clone() [2/2]

◆ yPlus()

◆ write()

Member Data Documentation

◆ n_