Public Member Functions | Protected Attributes | List of all members
NonSphereDragForce< CloudType > Class Template Reference

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

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Public Member Functions

 TypeName ("nonSphereDrag")
 Runtime type information. More...
 
 NonSphereDragForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict)
 Construct from mesh. More...
 
 NonSphereDragForce (const NonSphereDragForce< CloudType > &df)
 Construct copy. More...
 
virtual autoPtr< ParticleForce< CloudType > > clone () const
 Construct and return a clone. More...
 
virtual ~NonSphereDragForce ()
 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 non-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 ~ParticleForce ()
 Destructor. More...
 
const CloudType & owner () const
 Return const access to the cloud owner. More...
 
CloudType & owner ()
 Return references 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 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...
 

Protected Attributes

const scalar phi_
 The ratio of the surface area of a sphere with the same volume as. More...
 
const scalar a_
 Coefficient. More...
 
const scalar b_
 Coefficient. More...
 
const scalar c_
 Coefficient. More...
 
const scalar d_
 Coefficient. 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::NonSphereDragForce< CloudType >

Drag model for non-spherical particles.

The drag coefficient is given by:

\[ Cd = \frac{24}{Re} (1 + a Re^{b}) + Re \frac{c}{Re + d} \]

Where $a$, $b$, $c$, and $d$ are coefficients, calculated as functions of $phi$. $phi$ is the ratio of the surface area of a sphere with the same volume as the particle to the actual surface area of the particle, and must be between 0 and 1.

Reference: 

    Haider, A., & Levenspiel, O. (1989).
    Drag coefficient and terminal velocity of spherical and nonspherical
    particles.
    Powder technology, 58(1), 63-70.

Definition at line 64 of file NonSphereDragForce.H.

Constructor & Destructor Documentation

◆ NonSphereDragForce() [1/2]

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

Construct from mesh.

Definition at line 31 of file NonSphereDragForce.C.

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

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◆ NonSphereDragForce() [2/2]

NonSphereDragForce ( const NonSphereDragForce< CloudType > &  df)

Construct copy.

Definition at line 56 of file NonSphereDragForce.C.

◆ ~NonSphereDragForce()

~NonSphereDragForce
virtual

Destructor.

Definition at line 73 of file NonSphereDragForce.C.

Member Function Documentation

◆ TypeName()

TypeName ( "nonSphereDrag"  )

Runtime type information.

◆ clone()

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

Construct and return a clone.

Reimplemented from ParticleForce< CloudType >.

Definition at line 110 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

Calculate the non-coupled force.

Reimplemented from ParticleForce< CloudType >.

Definition at line 80 of file NonSphereDragForce.C.

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

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Member Data Documentation

◆ phi_

const scalar phi_
protected

The ratio of the surface area of a sphere with the same volume as.

the particle to the actual surface area of the particle. Between 0 and 1.

Definition at line 75 of file NonSphereDragForce.H.

◆ a_

const scalar a_
protected

Coefficient.

Definition at line 78 of file NonSphereDragForce.H.

◆ b_

const scalar b_
protected

Coefficient.

Definition at line 81 of file NonSphereDragForce.H.

◆ c_

const scalar c_
protected

Coefficient.

Definition at line 84 of file NonSphereDragForce.H.

◆ d_

const scalar d_
protected

Coefficient.

Definition at line 87 of file NonSphereDragForce.H.

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