NonSphereDragForce< CloudType > Class Template Reference

Drag model for non-spherical particles. More...

Inheritance diagram for NonSphereDragForce< CloudType >:

Collaboration diagram for NonSphereDragForce< CloudType >:

Public Member Functions
	TypeName ("nonSphereDrag")
	NonSphereDragForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict)
	NonSphereDragForce (const NonSphereDragForce< CloudType > &df)
virtual autoPtr< ParticleForce< CloudType > >	clone () const
virtual	~NonSphereDragForce ()
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
Public Member Functions inherited from ParticleForce< CloudType >
	TypeName ("particleForce")
	declareRunTimeSelectionTable (autoPtr, ParticleForce, dictionary,(CloudType &owner, const fvMesh &mesh, const dictionary &dict),(owner, mesh, dict))
	ParticleForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict, const word &forceType, const bool readCoeffs)
	ParticleForce (const ParticleForce &pf)
virtual	~ParticleForce ()
const CloudType &	owner () const
CloudType &	owner ()
const fvMesh &	mesh () const
const dictionary &	coeffs () const
virtual void	cacheFields (const bool store)
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
virtual scalar	massAdd (const typename CloudType::parcelType &p, const typename CloudType::parcelType::trackingData &td, const scalar mass) const

Protected Member Functions
scalar	CdRe (const scalar Re) const

Protected Attributes
scalar	phi_
scalar	a_
scalar	b_
scalar	c_
scalar	d_

Additional Inherited Members
Public Types inherited from ParticleForce< CloudType >
typedef VectorSpace< Vector< vector >, vector, 2 >	returnType
Static Public Member Functions inherited from ParticleForce< CloudType >
static autoPtr< ParticleForce< CloudType > >	New (CloudType &owner, const fvMesh &mesh, const dictionary &dict, const word &forceType)

Detailed Description

template<class CloudType>
class Foam::NonSphereDragForce< CloudType >

Drag model for non-spherical particles.

Takes the form of

24.0/Re*(1.0 + a_*pow(Re, b_)) + Re*c_/(Re + d_);

Where a(phi), b(phi), c(phi) and d(phi) are model coefficients, with phi defined as:

area of sphere with same volume as particle phi = ——————————————- actual particle area

Equation used is Eqn (11) of reference below - good to within 2 to 4 % of RMS values from experiment.

H and L also give a simplified model with greater error compared to results from experiment - Eqn 12 - but since phi is presumed constant, it offers little benefit.

Reference:

    "Drag coefficient and terminal velocity of spherical and nonspherical
    particles"
    A. Haider and O. Levenspiel,
    Powder Technology
    Volume 58, Issue 1, May 1989, Pages 63-70

Definition at line 72 of file NonSphereDragForce.H.

Constructor & Destructor Documentation

NonSphereDragForce() [1/2]

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

Definition at line 36 of file NonSphereDragForce.C.

References Foam::exit(), Foam::FatalError, and FatalErrorInFunction.

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NonSphereDragForce() [2/2]

NonSphereDragForce

(

const NonSphereDragForce< CloudType > &

df

)

Definition at line 61 of file NonSphereDragForce.C.

~NonSphereDragForce()

~NonSphereDragForce

virtual

Definition at line 77 of file NonSphereDragForce.C.

Member Function Documentation

CdRe()

Foam::scalar CdRe ( const scalar  Re ) const

protected

Definition at line 26 of file NonSphereDragForce.C.

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

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TypeName()

TypeName

(

"nonSphereDrag"

)

clone()

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

inlinevirtual

Reimplemented from ParticleForce< CloudType >.

Definition at line 122 of file NonSphereDragForce.H.

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

Reimplemented from ParticleForce< CloudType >.

Definition at line 85 of file NonSphereDragForce.C.

References p, Foam::Re(), forceSuSp::Sp(), Foam::sqr(), and Foam::Zero.

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Member Data Documentation

phi_

scalar phi_

protected

Definition at line 82 of file NonSphereDragForce.H.

a_

scalar a_

protected

Definition at line 87 of file NonSphereDragForce.H.

b_

scalar b_

protected

Definition at line 89 of file NonSphereDragForce.H.

c_

scalar c_

protected

Definition at line 91 of file NonSphereDragForce.H.

d_

scalar d_

protected

Definition at line 93 of file NonSphereDragForce.H.

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

• src/lagrangian/intermediate/submodels/Kinematic/ParticleForces/Drag/NonSphereDrag/NonSphereDragForce.H
• src/lagrangian/intermediate/submodels/Kinematic/ParticleForces/Drag/NonSphereDrag/NonSphereDragForce.C