Nusselt-number model using the empirical Ranz-Marshall correlation to be used in modelling of the fluid-particle heat transfer coefficient: More...

Inheritance diagram for RanzMarshall< CloudType >:

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Collaboration diagram for RanzMarshall< CloudType >:

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

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

	RanzMarshall (const dictionary &dict, CloudType &cloud)
	Construct from dictionary. More...

	RanzMarshall (const RanzMarshall< CloudType > &im)
	Copy construct. More...

virtual autoPtr< HeatTransferModel< CloudType > >	clone () const
	Construct and return a clone. More...

virtual	~RanzMarshall ()=default
	Destructor. More...

virtual scalar	Nu (const scalar Re, const scalar Pr) const
	Return Nusselt number. More...

Public Member Functions inherited from HeatTransferModel< CloudType >
	TypeName ("heatTransferModel")
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, HeatTransferModel, dictionary,(const dictionary &dict, CloudType &owner),(dict, owner))
	Declare runtime constructor selection table. More...

void	operator= (const HeatTransferModel< CloudType > &)=delete
	No copy assignment. More...

	HeatTransferModel (CloudType &owner)
	Construct null from owner. More...

	HeatTransferModel (const dictionary &dict, CloudType &owner, const word &type)
	Construct from dictionary. More...

	HeatTransferModel (const HeatTransferModel< CloudType > &htm)
	Copy construct. More...

virtual	~HeatTransferModel ()=default
	Destructor. More...

bool	BirdCorrection () const noexcept
	The Bird HTC correction flag. More...

virtual scalar	htc (const scalar dp, const scalar Re, const scalar Pr, const scalar kappa, const scalar NCpW) const
	Return heat transfer coefficient. More...

Additional Inherited Members
Static Public Member Functions inherited from HeatTransferModel< CloudType >
static autoPtr< HeatTransferModel< CloudType > >	New (const dictionary &dict, CloudType &owner)
	Selector. More...

Detailed Description

template<class CloudType>
class Foam::RanzMarshall< CloudType >

Nusselt-number model using the empirical Ranz-Marshall correlation to be used in modelling of the fluid-particle heat transfer coefficient:

\[ \mathrm{Nu} = a + b \, \mathrm{Re}_p^{m} \, \mathrm{Pr}^{n} \]

with

\[ \mathrm{Re}_p = \frac{\rho_c \, | \mathbf{u}_\mathrm{rel} | \, d_p}{\mu_c} \]

\[ \mathrm{Pr} = \frac{ C_p \, \mu_c }{ \kappa_c } \]

where

\( \mathrm{Nu} \)	=	Nusselt number
\( \mathrm{Re}_p \)	=	Particle Reynolds number
\( \mathrm{Pr} \)	=	Prandtl number
\( d_p \)	=	Particle diameter
\( \rho_c \)	=	Density of carrier in the film surrounding particle
\( \mu_c \)	=	Dynamic viscosity of carrier in the film surrounding particle
\( \mathbf{u}_\mathrm{rel} \)	=	Relative velocity between particle and carrier
\( a \)	=	Correlation coefficient
\( b \)	=	Correlation coefficient
\( m \)	=	Correlation exponent of particle Reynolds number
\( n \)	=	Correlation exponent of Prandtl number
\( C_p \)	=	Specific heat capacity
\( \kappa_c \)	=	Thermal conductivity of carrier in the film

Reference:

        Standard model:
            Ranz, W. E., & Marshall, W. R. (1952).
            Evaporation from drops - part 1.
            Chem. Eng. Prog, 48, 22, pp. 141-146.

            Ranz, W. E., & Marshall, W. R. (1952).
            Evaporation from drops - part 2.
            Chem. Eng. Prog, 48, 4, pp. 173-180.

        Expressions (tag:AOB), p. 18:
            Amsden, A. A., O'Rourke, P. J., & Butler, T. D. (1989).
            KIVA-II: A computer program for chemically
            reactive flows with sprays (No. LA-11560-MS).
            Los Alamos National Lab.(LANL), Los Alamos, NM (United States).
            DOI:10.2172/6228444

Usage

Minimal example by using constant/<CloudProperties>:

subModels
{
    // Mandatory entries
    heatTransferModel    RanzMarshall;

    // Optional entries
    RanzMarshallCoeffs
    {
        a    2.0;
        b    0.6;
        m    0.5;
        n    0.66666;
    }
}

where the entries mean:

Property	Description	Type	Reqd	Deflt
`heatTransferModel`	Type name: RanzMarshall	word	yes	-
`a`	Correlation coefficient	scalar	no	2.0
`b`	Correlation coefficient	scalar	no	0.6
`m`	Correlation exponent of particle Reynolds number	scalar	no	0.5
`n`	Correlation exponent of Prandtl number	scalar	no	1.0/3.0

Source files

Definition at line 223 of file RanzMarshall.H.

Constructor & Destructor Documentation

◆ RanzMarshall() [1/2]

RanzMarshall	(	const dictionary &	dict,
		CloudType &	cloud
	)

Construct from dictionary.

Definition at line 35 of file RanzMarshall.C.

◆ RanzMarshall() [2/2]

RanzMarshall ( const RanzMarshall< CloudType > & im )

Copy construct.

Definition at line 49 of file RanzMarshall.C.

◆ ~RanzMarshall()

virtual ~RanzMarshall ( )

virtualdefault

Destructor.

Member Function Documentation

◆ TypeName()

TypeName ( "RanzMarshall< CloudType >" )

Runtime type information.

◆ operator=()

void operator= ( const RanzMarshall< CloudType > & )

delete

No copy assignment.

◆ clone()

virtual autoPtr<HeatTransferModel<CloudType> > clone ( ) const

inlinevirtual

Construct and return a clone.

Implements HeatTransferModel< CloudType >.

Definition at line 263 of file RanzMarshall.H.

◆ Nu()

Foam::scalar Nu	(	const scalar	Re,
		const scalar	Pr
	)		const

virtual

Return Nusselt number.

Implements HeatTransferModel< CloudType >.

Definition at line 63 of file RanzMarshall.C.

References Foam::pow(), Pr(), and Foam::Re().

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

src/lagrangian/intermediate/submodels/Thermodynamic/HeatTransferModel/RanzMarshall/RanzMarshall.H
src/lagrangian/intermediate/submodels/Thermodynamic/HeatTransferModel/RanzMarshall/RanzMarshall.C

Public Member Functions

Additional Inherited Members