Applies a tabulated heat transfer model for inter-region heat exchanges. The heat flux is calculated based on the Number of Thermal Units (NTU). More...

Inheritance diagram for tabulatedNTUHeatTransfer:

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Collaboration diagram for tabulatedNTUHeatTransfer:

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Public Types
enum	geometryModeType { gmCalculated, gmUser }

Public Member Functions
	TypeName ("tabulatedNTUHeatTransfer")

	tabulatedNTUHeatTransfer (const word &name, const word &modelType, const dictionary &dict, const fvMesh &mesh)

	tabulatedNTUHeatTransfer (const tabulatedNTUHeatTransfer &)=delete

void	operator= (const tabulatedNTUHeatTransfer &)=delete

virtual	~tabulatedNTUHeatTransfer ()=default

virtual void	calculateHtc ()

virtual bool	read (const dictionary &dict)

Public Member Functions inherited from interRegionHeatTransferModel
	TypeName ("interRegionHeatTransferModel")

	interRegionHeatTransferModel (const word &name, const word &modelType, const dictionary &dict, const fvMesh &mesh)

virtual	~interRegionHeatTransferModel ()=default

const word &	nbrRegionName () const

const meshToMesh &	meshInterp () const

const volScalarField &	htc () const

const interRegionHeatTransferModel &	nbrModel () const

interRegionHeatTransferModel &	nbrModel ()

virtual void	addSup (fvMatrix< scalar > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &rho, fvMatrix< scalar > &eqn, const label fieldi)

template<class Type >
Foam::tmp< Foam::Field< Type > >	interpolate (const interRegionHeatTransferModel &nbrModel, const Field< Type > &field) const

template<class Type >
Foam::tmp< Foam::Field< Type > >	interpolate (const Field< Type > &field) const

Public Member Functions inherited from interRegionOption
	TypeName ("interRegionOption")

	interRegionOption (const word &name, const word &modelType, const dictionary &dict, const fvMesh &mesh)

	interRegionOption (const interRegionOption &)=delete

void	operator= (const interRegionOption &)=delete

virtual	~interRegionOption ()=default

const word &	nbrRegionName () const

const meshToMesh &	meshInterp () const

Public Member Functions inherited from option
	TypeName ("option")

	declareRunTimeSelectionTable (autoPtr, option, dictionary,(const word &name, const word &modelType, const dictionary &dict, const fvMesh &mesh),(name, modelType, dict, mesh))

	option (const word &name, const word &modelType, const dictionary &dict, const fvMesh &mesh)

autoPtr< option >	clone () const

virtual	~option ()=default

const word &	name () const noexcept

const fvMesh &	mesh () const noexcept

const dictionary &	coeffs () const noexcept

bool	active () const noexcept

void	setApplied (const label fieldi)

bool	active (const bool on) noexcept

virtual bool	isActive ()

virtual label	applyToField (const word &fieldName) const

virtual void	checkApplied () const

virtual void	addSup (fvMatrix< vector > &eqn, const label fieldi)

virtual void	addSup (fvMatrix< symmTensor > &eqn, const label fieldi)

virtual void	addSup (fvMatrix< sphericalTensor > &eqn, const label fieldi)

virtual void	addSup (fvMatrix< tensor > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &rho, fvMatrix< vector > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &rho, fvMatrix< symmTensor > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &rho, fvMatrix< sphericalTensor > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &rho, fvMatrix< tensor > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &alpha, const volScalarField &rho, fvMatrix< scalar > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &alpha, const volScalarField &rho, fvMatrix< vector > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &alpha, const volScalarField &rho, fvMatrix< symmTensor > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &alpha, const volScalarField &rho, fvMatrix< sphericalTensor > &eqn, const label fieldi)

virtual void	addSup (const volScalarField &alpha, const volScalarField &rho, fvMatrix< tensor > &eqn, const label fieldi)

virtual void	constrain (fvMatrix< scalar > &eqn, const label fieldi)

virtual void	constrain (fvMatrix< vector > &eqn, const label fieldi)

virtual void	constrain (fvMatrix< sphericalTensor > &eqn, const label fieldi)

virtual void	constrain (fvMatrix< symmTensor > &eqn, const label fieldi)

virtual void	constrain (fvMatrix< tensor > &eqn, const label fieldi)

virtual void	correct (volScalarField &field)

virtual void	correct (volVectorField &field)

virtual void	correct (volSphericalTensorField &field)

virtual void	correct (volSymmTensorField &field)

virtual void	correct (volTensorField &field)

virtual void	postProcessSens (scalarField &sensField, const word &fieldName=word::null, const word &designVariablesName=word::null)

virtual void	postProcessSens (vectorField &sensField, const word &fieldName=word::null, const word &designVariablesName=word::null)

virtual void	postProcessSens (tensorField &sensField, const word &fieldName=word::null, const word &designVariablesName=word::null)

virtual void	writeHeader (Ostream &) const

virtual void	writeFooter (Ostream &) const

virtual void	writeData (Ostream &) const

Static Public Attributes
static const Enum< geometryModeType >	geometryModelNames_

Additional Inherited Members
Static Public Member Functions inherited from option
static autoPtr< option >	New (const word &name, const dictionary &dict, const fvMesh &mesh)

Public Attributes inherited from option
bool	log

Protected Member Functions inherited from interRegionHeatTransferModel
void	setNbrModel ()

void	correct ()

template<class Type >
tmp< Field< Type > >	interpolate (const interRegionHeatTransferModel &nbrModel, const Field< Type > &field) const

template<class Type >
tmp< Field< Type > >	interpolate (const Field< Type > &field) const

template<class Type >
void	interpolate (const interRegionHeatTransferModel &nbrModel, const Field< Type > &field, Field< Type > &result) const

template<class Type >
void	interpolate (const Field< Type > &field, Field< Type > &result) const

Protected Member Functions inherited from interRegionOption
void	setMapper ()

Protected Member Functions inherited from option
void	resetApplied ()

Protected Attributes inherited from interRegionHeatTransferModel
word	nbrModelName_

interRegionHeatTransferModel *	nbrModel_

bool	firstIter_

bool	semiImplicit_

label	timeIndex_

volScalarField	htc_

word	TName_

word	TNbrName_

Protected Attributes inherited from interRegionOption
bool	master_

word	nbrRegionName_

autoPtr< meshToMesh >	meshInterpPtr_

Protected Attributes inherited from option
const word	name_

const word	modelType_

const fvMesh &	mesh_

dictionary	dict_

dictionary	coeffs_

wordList	fieldNames_

List< bool >	applied_

bool	active_

Detailed Description

Applies a tabulated heat transfer model for inter-region heat exchanges. The heat flux is calculated based on the Number of Thermal Units (NTU).

A 2-D table of NTU as functions of the primary and secondary mass flow rates is required.

The exchanger geometry can be specified using either:

calculated:
- inlet area of each region and core volume determined by interrogating mesh patches, and mesh-to-mesh interpolation volume
- calculated core volume can be partially blocked by specifying a coreBlockageRatio [0-1] entry
user:
- inlet area of each region provided by the user
- core volume automatically calculated by the mesh-to-mesh interpolation volume if not provided by user

Heat transfer coefficient calculated by:

$htc = C_{min} \frac{NTU}{V_{core}}$

Where $C_{min}$ is given by:

$C_{min} = min \left(Cp_1 \dot{m}_1, Cp_2 \dot{m}_2 \right)$

Usage

Minimal example by using constant/fvOptions:

tabulatedNTUHeatTransfer1
{
    // Mandatory entries (unmodifiable)
    type            tabulatedNTUHeatTransfer;

    // Mandatory entries (runtime modifiable)
    geometryMode    <geometryMode>;
    outOfBounds     clamp;
    file            "ntuTable";

    // Optional entries (runtime modifiable)
    U               <Uname>;
    Unbr            <UnbrName>;
    rho             <rhoName>;
    rhoNbr          <rhoNbrName>;

    // Conditional mandatory entries (runtime modifiable)

        // when geometryMode=user
        Ain             0.01728;
        AinNbr          0.3456;

        // when geometryMode=calculated
        inletPatch      inlet_HWK;
        inletPatchNbr   inlet_air;
        inletBlockageRatio 0.10;
        inletBlockageRatioNbr 0.04;
        coreBlockageRatio 0;

    // Conditional optional entries (runtime modifiable)

        // when geometryMode=user
        Vcore           0.01244;

    // Mandatory/Optional (inherited) entries
    ...
}

where the entries mean:

Property	Description	Type	Reqd	Dflt
`type`	Type name: tabulatedNTUHeatTransfer	word	yes	-
`geometryMode`	Geometry mode type	word	yes	-
`file`	Heat transfer coefficient table	interpolate2DTable	yes	-
`U`	Name of operand velocity field	word	no	U
`Unbr`	Name of operand neighbour velocity field	word	no	U
`Ain`	Inlet area [m2]	scalar	cndtnl	-
`AinNbr`	Neighbour region inlet area [m2]	scalar	cndtnl	-
`Vcore`	Heat exchanger core volume	scalar	cndtnl	-
`inletPatch`	Name of inlet patch	word	cndtnl	-
`inletNbrPatch`	Name of inlet patch neighbour	word	cndtnl	-
`inletBlockageRatio`	Inlet patch blockage ratio [0, 1]	scalar	cndtnl	-
`inletBlockageRatioNbr`	Inlet neighbour patch blockage ratio [0, 1]	scalar	cndtnl	-
`coreBlockageRatio`	Core volume blockage ratio [0, 1]	scalar	cndtnl	-

The inherited entries are elaborated in:

Options for the geometryMode entry:

      calculated    | Use settings computed internally
      user          | Use settings provided by the user

Example usage:

    coolerToAir
    {
        type            tabulatedNTUHeatTransfer;
        active          yes;

        tabulatedNTUHeatTransferCoeffs
        {
            interpolationMethod cellVolumeWeight;
            nbrRegion       air;
            master          true;

            fields          (h);
            outOfBounds     clamp;
            file            "ntuTable";
            nbrModel        airToCooler;
            semiImplicit    no;


            geometryMode    user;
            Ain             0.01728;
            AinNbr          0.3456;
            Vcore           0.01244;  // Optional

            // geometryMode    calculated;
            // inletPatch      inlet_HWK;
            // inletPatchNbr   inlet_air;
            // inletBlockageRatio 0.10;
            // inletBlockageRatioNbr 0.04;
            // coreBlockageRatio 0;
        }
    }

See also

Source files

Definition at line 286 of file tabulatedNTUHeatTransfer.H.

Member Enumeration Documentation

◆ geometryModeType

enum geometryModeType

Enumerator
gmCalculated
gmUser

Definition at line 295 of file tabulatedNTUHeatTransfer.H.

Constructor & Destructor Documentation

◆ tabulatedNTUHeatTransfer() [1/2]

tabulatedNTUHeatTransfer	(	const word &	name,
		const word &	modelType,
		const dictionary &	dict,
		const fvMesh &	mesh
	)

Definition at line 184 of file tabulatedNTUHeatTransfer.C.

◆ tabulatedNTUHeatTransfer() [2/2]

tabulatedNTUHeatTransfer ( const tabulatedNTUHeatTransfer & )

delete

◆ ~tabulatedNTUHeatTransfer()

virtual ~tabulatedNTUHeatTransfer ( )

virtualdefault

Member Function Documentation

◆ TypeName()

TypeName ( "tabulatedNTUHeatTransfer" )

◆ operator=()

void operator= ( const tabulatedNTUHeatTransfer & )

delete

◆ calculateHtc()

void calculateHtc ( )

virtual

Implements interRegionHeatTransferModel.

Definition at line 206 of file tabulatedNTUHeatTransfer.C.

References Cp, basicThermo::Cp(), forAll, Foam::interpolate(), Foam::mag(), Foam::min(), rho, thermo, and U.

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◆ read()

bool read ( const dictionary & dict )

virtual

Reimplemented from interRegionHeatTransferModel.

Definition at line 248 of file tabulatedNTUHeatTransfer.C.

References dict, and option::read().

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Member Data Documentation

◆ geometryModelNames_

const Foam::Enum< Foam::fv::tabulatedNTUHeatTransfer::geometryModeType > geometryModelNames_

static

Definition at line 302 of file tabulatedNTUHeatTransfer.H.

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

src/fvOptions/sources/interRegion/interRegionHeatTransfer/tabulatedNTUHeatTransfer/tabulatedNTUHeatTransfer.H
src/fvOptions/sources/interRegion/interRegionHeatTransfer/tabulatedNTUHeatTransfer/tabulatedNTUHeatTransfer.C

Public Types

Public Member Functions

Static Public Attributes

Additional Inherited Members