Particle-drag model wherein drag forces (per unit carrier-fluid velocity) are dynamically computed by using sphereDrag model; however, are corrected for particle distortion by linearly varying the drag between of a sphere (i.e. sphereDrag) and a value of 1.54 corresponding to a disk. More...

Inheritance diagram for DistortedSphereDragForce< CloudType >:

[legend]

Collaboration diagram for DistortedSphereDragForce< CloudType >:

[legend]

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

	DistortedSphereDragForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict)
	Construct from mesh. More...

	DistortedSphereDragForce (const DistortedSphereDragForce< CloudType > &df)
	Construct copy. More...

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

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

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

virtual forceSuSp	calcCoupled (const typename CloudType::parcelType &p, const typename CloudType::parcelType::trackingData &td, const scalar dt, const scalar mass, const scalar Re, const scalar muc) const
	Calculate the coupled force. More...

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

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

	ParticleForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict, const word &forceType, const bool readCoeffs)
	Construct from mesh. More...

	ParticleForce (const ParticleForce &pf)
	Construct copy. More...

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

virtual	~ParticleForce ()
	Destructor. More...

const CloudType &	owner () const
	Return const access to the cloud owner. More...

CloudType &	owner ()
	Return reference to the cloud owner. More...

const fvMesh &	mesh () const
	Return the mesh database. More...

const dictionary &	coeffs () const
	Return the force coefficients dictionary. More...

virtual void	cacheFields (const bool store)
	Cache fields. More...

virtual forceSuSp	calcCoupled (const typename CloudType::parcelType &p, const typename CloudType::parcelType::trackingData &td, const scalar dt, const scalar mass, const scalar Re, const scalar muc) const
	Calculate the coupled force. More...

virtual forceSuSp	calcNonCoupled (const typename CloudType::parcelType &p, const typename CloudType::parcelType::trackingData &td, const scalar dt, const scalar mass, const scalar Re, const scalar muc) const
	Calculate the non-coupled force. More...

virtual scalar	massAdd (const typename CloudType::parcelType &p, const typename CloudType::parcelType::trackingData &td, const scalar mass) const
	Return the added mass. More...

Additional Inherited Members
Public Types inherited from ParticleForce< CloudType >
typedef VectorSpace< Vector< vector >, vector, 2 >	returnType
	Convenience typedef for return type. More...

Static Public Member Functions inherited from ParticleForce< CloudType >
static autoPtr< ParticleForce< CloudType > >	New (CloudType &owner, const fvMesh &mesh, const dictionary &dict, const word &forceType)
	Selector. More...

Detailed Description

template<class CloudType>
class Foam::DistortedSphereDragForce< CloudType >

Particle-drag model wherein drag forces (per unit carrier-fluid velocity) are dynamically computed by using sphereDrag model; however, are corrected for particle distortion by linearly varying the drag between of a sphere (i.e. sphereDrag) and a value of 1.54 corresponding to a disk.

\[ \mathrm{F}_\mathrm{D} = \frac{3}{4} \frac{\mu_c\,\mathrm{C}_\mathrm{D}\,\mathrm{Re}_p}{\rho_p \, d_p^2} \]

with

\[ \mathrm{C}_\mathrm{D} = \mathrm{C}_{\mathrm{D, sphere}} \left( 1 + 2.632 y \right) \]

where

\( \mathrm{F}_\mathrm{D} \)	=	Drag force per carrier-fluid velocity [kg/s]
\( \mathrm{C}_\mathrm{D} \)	=	Particle drag coefficient
\( \mathrm{C}_{\mathrm{D, sphere}} \)	=	Sphere drag coefficient
\( \mathrm{Re}_p \)	=	Particle Reynolds number
\( \rho_p \)	=	Particle mass density
\( d_p \)	=	Particle diameter
\( y \)	=	Level of distortion determined by other models internally

Constraints:

Applicable to particles with a spatially homogeneous distribution.
\( 1 \geq y \geq 0 \)

References:

        Standard model:
            Putnam, A. (1961).
            Integratable form of droplet drag coefficient.
            ARS Journal, 31(10), 1467-1468.

        Standard model (tag:AOB):
            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

        Expression correcting drag for particle distortion (tag:LMR):
            Liu, A. B., Mather, D., & Reitz, R. D. (1993).
            Modeling the effects of drop drag
            and breakup on fuel sprays.
            SAE Transactions, 83-95.
            DOI:10.4271/930072

Usage

Minimal example by using constant/<CloudProperties>:

subModels
{
    particleForces
    {
        distortedSphereDrag;
    }
}

where the entries mean:

Property	Description	Type	Reqd	Deflt
`type`	Type name: distortedSphereDrag	word	yes	-

Note

\(\mathrm{F}_\mathrm{D}\) is weighted with the particle mass at the stage of a function return, so that it can later be normalised with the effective mass, if necessary (e.g. when using virtual-mass forces).

See also

Foam::SphereDragForce

Source files

Definition at line 172 of file DistortedSphereDragForce.H.

Constructor & Destructor Documentation

◆ DistortedSphereDragForce() [1/2]

DistortedSphereDragForce	(	CloudType &	owner,
		const fvMesh &	mesh,
		const dictionary &	dict
	)

Construct from mesh.

Definition at line 52 of file DistortedSphereDragForce.C.

◆ DistortedSphereDragForce() [2/2]

DistortedSphereDragForce ( const DistortedSphereDragForce< CloudType > & df )

Construct copy.

Definition at line 64 of file DistortedSphereDragForce.C.

◆ ~DistortedSphereDragForce()

virtual ~DistortedSphereDragForce ( )

virtualdefault

Destructor.

Member Function Documentation

◆ TypeName()

TypeName ( "distortedSphereDrag" )

Runtime type information.

◆ clone()

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

inlinevirtual

Construct and return a clone.

Reimplemented from ParticleForce< CloudType >.

Definition at line 202 of file DistortedSphereDragForce.H.

◆ operator=()

void operator= ( const DistortedSphereDragForce< CloudType > & )

delete

No copy assignment.

◆ calcCoupled()

Foam::forceSuSp calcCoupled	(	const typename CloudType::parcelType &	p,
		const typename CloudType::parcelType::trackingData &	td,
		const scalar	dt,
		const scalar	mass,
		const scalar	Re,
		const scalar	muc
	)		const

virtual

Calculate the coupled force.

Reimplemented from ParticleForce< CloudType >.

Definition at line 76 of file DistortedSphereDragForce.C.

References Foam::max(), Foam::min(), p, Foam::Re(), Foam::sqr(), y, and Foam::Zero.

Here is the call graph for this function:

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

src/lagrangian/intermediate/submodels/Kinematic/ParticleForces/Drag/DistortedSphereDrag/DistortedSphereDragForce.H
src/lagrangian/intermediate/submodels/Kinematic/ParticleForces/Drag/DistortedSphereDrag/DistortedSphereDragForce.C

Public Member Functions

Additional Inherited Members