This boundary condition provides a wall function for 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 applications. More...

#include <nutUBlendedWallFunctionFvPatchScalarField.H>

Inheritance diagram for nutUBlendedWallFunctionFvPatchScalarField:

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Collaboration diagram for nutUBlendedWallFunctionFvPatchScalarField:

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Public Member Functions
	TypeName ("nutUBlendedWallFunction")
	Runtime type information.
	nutUBlendedWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &)
	Construct from patch and internal field.
	nutUBlendedWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &, const dictionary &)
	Construct from patch, internal field and dictionary.
	nutUBlendedWallFunctionFvPatchScalarField (const nutUBlendedWallFunctionFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)
	Construct by mapping given nutUBlendedWallFunctionFvPatchScalarField onto a new patch.
	nutUBlendedWallFunctionFvPatchScalarField (const nutUBlendedWallFunctionFvPatchScalarField &)
	Construct as copy.
	nutUBlendedWallFunctionFvPatchScalarField (const nutUBlendedWallFunctionFvPatchScalarField &, const DimensionedField< scalar, volMesh > &)
	Construct as copy setting internal field reference.
virtual tmp< fvPatchField< scalar > >	clone () const
	Return a clone.
virtual tmp< fvPatchField< scalar > >	clone (const DimensionedField< scalar, volMesh > &iF) const
	Clone with an internal field reference.
virtual tmp< scalarField >	yPlus () const
	Calculate and return the yPlus at the boundary.
virtual void	write (Ostream &os) const
	Write.
Public Member Functions inherited from nutWallFunctionFvPatchScalarField
	TypeName ("nutWallFunction")
	Runtime type information.
	nutWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &)
	Construct from patch and internal field.
	nutWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &, const dictionary &)
	Construct from patch, internal field and dictionary.
	nutWallFunctionFvPatchScalarField (const nutWallFunctionFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)
	Construct by mapping given nutWallFunctionFvPatchScalarField onto a new patch.
	nutWallFunctionFvPatchScalarField (const nutWallFunctionFvPatchScalarField &)
	Construct as copy.
	nutWallFunctionFvPatchScalarField (const nutWallFunctionFvPatchScalarField &, const DimensionedField< scalar, volMesh > &)
	Construct as copy setting internal field reference.
const wallFunctionCoefficients &	wallCoeffs () const noexcept
	Return wallFunctionCoefficients.
virtual void	updateCoeffs ()
	Update the coefficients associated with the patch field.

Protected Member Functions
virtual tmp< scalarField >	calcNut () const
	Calculate the turbulent viscosity.
tmp< scalarField >	calcUTau (const scalarField &magGradU) const
	Calculate the friction velocity.
void	writeLocalEntries (Ostream &) const
	Write local wall function variables.
Protected Member Functions inherited from nutWallFunctionFvPatchScalarField
virtual const volVectorField &	U (const turbulenceModel &turb) const
	Helper to return the velocity field either from the turbulence model (default) or the mesh database.
virtual void	checkType ()
	Check the type of the patch.
void	writeLocalEntries (Ostream &) const
	Write local wall function variables.

Protected Attributes
scalar	n_
	Model coefficient; default = 4.
Protected Attributes inherited from nutWallFunctionFvPatchScalarField
word	UName_
	Name of velocity field.
wallFunctionCoefficients	wallCoeffs_
	Wall-function coefficients.

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.

Detailed Description

This boundary condition provides a wall function for 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 applications.

$\‍[ u_\tau = (u_{\tau,vis}^n + u_{\tau,log}^n)^{1/n} \‍]$

where

$u_\tau$	=	Friction velocity
$u_{\tau,vis}$	=	Friction velocity in the viscous sublayer
$u_{\tau,log}$	=	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
    type            nutUBlendedWallFunction;

    // Optional entries
    n               4.0;

    // Inherited entries
    ...
 }

where the entries mean:

Property	Description	Type	Reqd	Deflt
`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.

Source files

Definition at line 139 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 131 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References n_, nutWallFunctionFvPatchScalarField::nutWallFunctionFvPatchScalarField(), and p.

Referenced by nutUBlendedWallFunctionFvPatchScalarField(), nutUBlendedWallFunctionFvPatchScalarField(), nutUBlendedWallFunctionFvPatchScalarField(), and TypeName().

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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 157 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References dict, n_, nutWallFunctionFvPatchScalarField::nutWallFunctionFvPatchScalarField(), and p.

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◆ 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 143 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References n_, nutUBlendedWallFunctionFvPatchScalarField(), nutWallFunctionFvPatchScalarField::nutWallFunctionFvPatchScalarField(), and p.

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◆ nutUBlendedWallFunctionFvPatchScalarField() [4/5]

nutUBlendedWallFunctionFvPatchScalarField ( const nutUBlendedWallFunctionFvPatchScalarField & wfpsf )

Construct as copy.

Definition at line 170 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References n_, nutUBlendedWallFunctionFvPatchScalarField(), and nutWallFunctionFvPatchScalarField::nutWallFunctionFvPatchScalarField().

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◆ nutUBlendedWallFunctionFvPatchScalarField() [5/5]

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

Construct as copy setting internal field reference.

Definition at line 181 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References n_, nutUBlendedWallFunctionFvPatchScalarField(), and nutWallFunctionFvPatchScalarField::nutWallFunctionFvPatchScalarField().

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Member Function Documentation

◆ calcNut()

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

protectedvirtual

Calculate the turbulent viscosity.

Implements nutWallFunctionFvPatchScalarField.

Definition at line 30 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References calcUTau(), IOobject::groupName(), Foam::mag(), Foam::max(), turbulenceModel::propertiesName, Foam::sqr(), and U.

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◆ calcUTau()

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

protected

Calculate the friction velocity.

Definition at line 58 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References e, forAll, IOobject::groupName(), Foam::log(), Foam::mag(), magUp, Foam::max(), n, n_, tmp< T >::New(), nutWallFunctionFvPatchScalarField::nutw(), fvPatchField< Type >::patchInternalField(), Foam::pow(), turbulenceModel::propertiesName, Foam::sqrt(), U, nutWallFunctionFvPatchScalarField::wallCoeffs_, y, yPlus(), and Foam::Zero.

Referenced by calcNut(), and yPlus().

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◆ writeLocalEntries()

void writeLocalEntries ( Ostream & os ) const

protected

Write local wall function variables.

Definition at line 120 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References n_, and os().

Referenced by write().

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◆ TypeName()

TypeName ( "nutUBlendedWallFunction" )

Runtime type information.

References nutUBlendedWallFunctionFvPatchScalarField().

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◆ clone() [1/2]

virtual tmp< fvPatchField< scalar > > clone ( ) const

inlinevirtual

Return a clone.

Definition at line 233 of file nutUBlendedWallFunctionFvPatchScalarField.H.

References fvPatchField< Type >::Clone().

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◆ clone() [2/2]

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

inlinevirtual

Clone with an internal field reference.

Definition at line 241 of file nutUBlendedWallFunctionFvPatchScalarField.H.

References fvPatchField< Type >::Clone().

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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 196 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References calcUTau(), IOobject::groupName(), Foam::mag(), turbulenceModel::propertiesName, fvPatchField< Type >::snGrad(), U, and y.

Referenced by calcUTau().

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◆ write()

void write ( Ostream & os ) const

virtual

Write.

Reimplemented from nutWallFunctionFvPatchScalarField.

Definition at line 221 of file nutUBlendedWallFunctionFvPatchScalarField.C.

References os(), nutWallFunctionFvPatchScalarField::write(), writeLocalEntries(), and fvPatchField< Type >::writeValueEntry().

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Member Data Documentation

◆ n_

scalar n_

protected

Model coefficient; default = 4.

Definition at line 150 of file nutUBlendedWallFunctionFvPatchScalarField.H.

Referenced by calcUTau(), nutUBlendedWallFunctionFvPatchScalarField(), nutUBlendedWallFunctionFvPatchScalarField(), nutUBlendedWallFunctionFvPatchScalarField(), nutUBlendedWallFunctionFvPatchScalarField(), nutUBlendedWallFunctionFvPatchScalarField(), and writeLocalEntries().

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()

◆ writeLocalEntries()

◆ TypeName()

◆ clone() [1/2]

◆ clone() [2/2]

◆ yPlus()

◆ write()

Member Data Documentation

◆ n_