Heat transfer coefficient calculation based on Reynolds Analogy, which is used to relate turbulent momentum and heat transfer. More...

#include <ReynoldsAnalogy.H>

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Public Member Functions
	TypeName ("ReynoldsAnalogy")
	Runtime type information.
	ReynoldsAnalogy (const dictionary &dict, const fvMesh &mesh, const word &TName)
	Construct from components.
	ReynoldsAnalogy (const ReynoldsAnalogy &)=delete
	No copy construct.
void	operator= (const ReynoldsAnalogy &)=delete
	No copy assignment.
virtual	~ReynoldsAnalogy ()=default
	Destructor.
virtual bool	read (const dictionary &dict)
	Read the function-object dictionary.
Public Member Functions inherited from heatTransferCoeffModel
	TypeName ("heatTransferCoeffModel")
	Runtime type information.
	declareRunTimeSelectionTable (autoPtr, heatTransferCoeffModel, dictionary,(const dictionary &dict, const fvMesh &mesh, const word &TName),(dict, mesh, TName))
	heatTransferCoeffModel (const dictionary &dict, const fvMesh &mesh, const word &TName)
	Construct from components.
	heatTransferCoeffModel (const heatTransferCoeffModel &)=delete
	No copy construct.
void	operator= (const heatTransferCoeffModel &)=delete
	No copy assignment.
virtual	~heatTransferCoeffModel ()=default
	Destructor.
const fvMesh &	mesh () const noexcept
	Return const reference to the mesh.
const labelList &	patchIDs () const noexcept
	Return const reference to wall patches to process.
const word &	TName () const noexcept
	Return const reference to name of temperature field.
const word &	qrName () const noexcept
	Return const reference to name of radiative heat-flux field.
tmp< FieldField< Field, scalar > >	q () const
	Return boundary fields of heat-flux field.
virtual bool	calc (volScalarField &result, const FieldField< Field, scalar > &q)
	Calculate the heat transfer coefficient field and return true if successful.

Protected Member Functions
virtual tmp< scalarField >	rho (const label patchi) const
	Return fluid density field [kg/m^3].
virtual tmp< scalarField >	Cp (const label patchi) const
	Return heat capacity at constant pressure [J/kg/K].
virtual tmp< volSymmTensorField >	devReff () const
	Return the effective stress tensor including the laminar stress.
tmp< FieldField< Field, scalar > >	Cf () const
	Return skin friction coefficient field [-].
virtual void	htc (volScalarField &htc, const FieldField< Field, scalar > &q)
	Set the heat transfer coefficient.

Protected Attributes
word	UName_
	Name of velocity field.
vector	URef_
	Reference velocity.
word	rhoName_
	Name of fluid density field.
scalar	rhoRef_
	Reference fluid density.
word	CpName_
	Name of specific heat capacity field.
scalar	CpRef_
	Reference specific heat capacity.
Protected Attributes inherited from heatTransferCoeffModel
const fvMesh &	mesh_
	Const reference to the mesh.
labelList	patchIDs_
	List of (wall) patches to process (selected by name).
const word	TName_
	Name of temperature field.
word	qrName_
	Name of radiative heat flux field.

Additional Inherited Members
Static Public Member Functions inherited from heatTransferCoeffModel
static autoPtr< heatTransferCoeffModel >	New (const dictionary &dict, const fvMesh &mesh, const word &TName)
	Return a reference to the selected heat transfer coefficient model.

Detailed Description

Heat transfer coefficient calculation based on Reynolds Analogy, which is used to relate turbulent momentum and heat transfer.

The heat transfer coefficient is derived from the skin friction coefficient:

$\‍[ C_f = \frac{\tau_w}{0.5 \rho_{ref} |U|^2} \‍]$

as:

$\‍[ h = 0.5 \rho_{ref} c_{p,ref} |U_{ref}| C_f \‍]$

where

	=	Heat transfer coefficient [W/m^2/K]
$\rho_{ref}$	=	Reference fluid density [kg/m^3]
$c_{p,ref}$	=	Reference specific heat capacity at constant pressure [J/kg/K]
$U_{ref}$	=	Reference velocity [m/s]
	=	Skin friction coefficient [-]
$\tau_w$	=	Wall shear stress [m^2/s^2]

Usage

Minimal example by using system/controlDict.functions:

heatTransferCoeffFO
{
    // Inherited entries
    ...

    // Mandatory entries
    htcModel        ReynoldsAnalogy;
    UInf            <vector>;

    // Optional entries
    U               <word>;
    Cp              <word>;
    rho             <word>;

    // Conditional mandatory entries

        // when Cp == CpInf
        CpInf       <scalar>;

        // when rho == rhoInf
        rhoInf      <scalar>;
}

where the entries mean:

Property	Description	Type	Reqd	Deflt
`type`	Model name: ReynoldsAnalogy	word	yes	-
`UInf`	Reference velocity	vector	yes	-
`U`	Name of velocity field	word	no	U
`Cp`	Name of reference specific heat capacity	word	no	Cp
`CpInf`	Reference specific heat capacity value	scalar	choice	-
`rho`	Name of fluid density field	word	no	rho
`rhoInf`	Reference fluid density value	scalar	choice	-

Note

In order to use a reference Cp, set Cp to CpInf.
In order to use a reference rho, set rho to rhoInf.

Source files

Definition at line 186 of file ReynoldsAnalogy.H.

Constructor & Destructor Documentation

◆ ReynoldsAnalogy() [1/2]

ReynoldsAnalogy	(	const dictionary &	dict,
		const fvMesh &	mesh,
		const word &	TName )

Construct from components.

Definition at line 210 of file ReynoldsAnalogy.C.

References CpName_, CpRef_, dict, heatTransferCoeffModel::heatTransferCoeffModel(), heatTransferCoeffModel::mesh(), read(), rhoName_, rhoRef_, heatTransferCoeffModel::TName(), UName_, URef_, and Foam::Zero.

Referenced by operator=(), and ReynoldsAnalogy().

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◆ ReynoldsAnalogy() [2/2]

ReynoldsAnalogy ( const ReynoldsAnalogy & )

delete

No copy construct.

References ReynoldsAnalogy().

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◆ ~ReynoldsAnalogy()

virtual ~ReynoldsAnalogy ( )

virtualdefault

Destructor.

References dict.

Member Function Documentation

◆ rho()

Foam::tmp< Foam::scalarField > rho ( const label patchi ) const

protectedvirtual

Return fluid density field [kg/m^3].

Definition at line 47 of file ReynoldsAnalogy.C.

References Foam::exit(), Foam::FatalError, FatalErrorInFunction, heatTransferCoeffModel::mesh_, n, tmp< T >::New(), rho(), rhoName_, and rhoRef_.

Referenced by rho().

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◆ Cp()

Foam::tmp< Foam::scalarField > Cp ( const label patchi ) const

protectedvirtual

Return heat capacity at constant pressure [J/kg/K].

Definition at line 69 of file ReynoldsAnalogy.C.

References CpName_, CpRef_, basicThermo::dictName, Foam::exit(), Foam::FatalError, FatalErrorInFunction, heatTransferCoeffModel::mesh_, n, tmp< T >::New(), and pp().

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◆ devReff()

Foam::tmp< Foam::volSymmTensorField > devReff ( ) const

protectedvirtual

Return the effective stress tensor including the laminar stress.

Definition at line 96 of file ReynoldsAnalogy.C.

References Foam::devTwoSymm(), basicThermo::dictName, Foam::dimViscosity, Foam::exit(), Foam::FatalError, FatalErrorInFunction, Foam::fvc::grad(), heatTransferCoeffModel::mesh_, nu, transportProperties(), turb, U, and UName_.

Referenced by Cf().

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◆ Cf()

Foam::tmp< Foam::FieldField< Foam::Field, Foam::scalar > > Cf ( ) const

protected

Return skin friction coefficient field [-].

Definition at line 154 of file ReynoldsAnalogy.C.

References Cf(), devReff(), forAll, Foam::mag(), Foam::magSqr(), heatTransferCoeffModel::mesh_, Foam::New(), fvPatch::nf(), fvPatchFieldBase::patch(), heatTransferCoeffModel::patchIDs_, R, U, UName_, URef_, and Foam::Zero.

Referenced by Cf(), and htc().

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◆ htc()

void htc	(	volScalarField &	htc,
		const FieldField< Field, scalar > &	q )

protectedvirtual

Set the heat transfer coefficient.

Implements heatTransferCoeffModel.

Definition at line 187 of file ReynoldsAnalogy.C.

References Cf(), Cp, htc(), Foam::mag(), heatTransferCoeffModel::patchIDs_, heatTransferCoeffModel::q(), rho, and URef_.

Referenced by htc().

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◆ TypeName()

TypeName ( "ReynoldsAnalogy" )

Runtime type information.

References dict, heatTransferCoeffModel::mesh(), and heatTransferCoeffModel::TName().

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◆ operator=()

void operator= ( const ReynoldsAnalogy & )

delete

No copy assignment.

References ReynoldsAnalogy().

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◆ read()

bool read ( const dictionary & dict )

virtual

Read the function-object dictionary.

Reimplemented from heatTransferCoeffModel.

Definition at line 231 of file ReynoldsAnalogy.C.

References CpName_, CpRef_, dict, heatTransferCoeffModel::read(), rhoName_, rhoRef_, UName_, and URef_.

Referenced by ReynoldsAnalogy().

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Member Data Documentation

◆ UName_

word UName_

protected

Name of velocity field.

Definition at line 197 of file ReynoldsAnalogy.H.

Referenced by Cf(), devReff(), read(), and ReynoldsAnalogy().

◆ URef_

vector URef_

protected

Reference velocity.

Definition at line 202 of file ReynoldsAnalogy.H.

Referenced by Cf(), htc(), read(), and ReynoldsAnalogy().

◆ rhoName_

word rhoName_

protected

Name of fluid density field.

Definition at line 207 of file ReynoldsAnalogy.H.

Referenced by read(), ReynoldsAnalogy(), and rho().

◆ rhoRef_

scalar rhoRef_

protected

Reference fluid density.

Definition at line 212 of file ReynoldsAnalogy.H.

Referenced by read(), ReynoldsAnalogy(), and rho().

◆ CpName_

word CpName_

protected

Name of specific heat capacity field.

Definition at line 217 of file ReynoldsAnalogy.H.

Referenced by Cp(), read(), and ReynoldsAnalogy().

◆ CpRef_

scalar CpRef_

protected

Reference specific heat capacity.

Definition at line 222 of file ReynoldsAnalogy.H.

Referenced by Cp(), read(), and ReynoldsAnalogy().

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

src/functionObjects/field/heatTransferCoeff/heatTransferCoeffModels/ReynoldsAnalogy/ReynoldsAnalogy.H
src/functionObjects/field/heatTransferCoeff/heatTransferCoeffModels/ReynoldsAnalogy/ReynoldsAnalogy.C

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ReynoldsAnalogy() [1/2]

◆ ReynoldsAnalogy() [2/2]

◆ ~ReynoldsAnalogy()

Member Function Documentation

◆ rho()

◆ Cp()

◆ devReff()

◆ Cf()

◆ htc()

◆ TypeName()

◆ operator=()

◆ read()

Member Data Documentation

◆ UName_

◆ URef_

◆ rhoName_

◆ rhoRef_

◆ CpName_

◆ CpRef_