Drag model for nonspherical particles. More...
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 scalar dt, const scalar mass, const scalar Re, const scalar muc) const 
Calculate the noncoupled 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 refernce 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 scalar dt, const scalar mass, const scalar Re, const scalar muc) const 
Calculate the noncoupled force. More...  
virtual scalar  massAdd (const typename CloudType::parcelType &p, const scalar mass) const 
Return the added mass. More...  
Protected Member Functions  
scalar  CdRe (const scalar Re) const 
Drag coefficient multiplied by Reynolds number. More...  
Protected Attributes  
scalar  phi_ 
Ratio of surface of sphere having same volume as particle to. More...  
scalar  a_ 
scalar  b_ 
scalar  c_ 
scalar  d_ 
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...  
Drag model for nonspherical particles.
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 6370
Definition at line 73 of file NonSphereDragForce.H.
NonSphereDragForce  (  CloudType &  owner, 
const fvMesh &  mesh,  
const dictionary &  dict  
) 
Construct from mesh.
Definition at line 41 of file NonSphereDragForce.C.
References Foam::exit(), Foam::FatalError, and FatalErrorInFunction.
Referenced by NonSphereDragForce< CloudType >::CdRe().
NonSphereDragForce  (  const NonSphereDragForce< CloudType > &  df  ) 
Construct copy.
Definition at line 66 of file NonSphereDragForce.C.

virtual 
Destructor.
Definition at line 82 of file NonSphereDragForce.C.
References NonSphereDragForce< CloudType >::calcCoupled().
Referenced by NonSphereDragForce< CloudType >::clone().

protected 
Drag coefficient multiplied by Reynolds number.
Definition at line 31 of file NonSphereDragForce.C.
References NonSphereDragForce< CloudType >::NonSphereDragForce(), and Foam::pow().
TypeName  (  "nonSphereDrag"  ) 
Runtime type information.

inlinevirtual 
Construct and return a clone.
Reimplemented from ParticleForce< CloudType >.
Definition at line 123 of file NonSphereDragForce.H.
References NonSphereDragForce< CloudType >::calcCoupled(), p, Foam::Re(), and NonSphereDragForce< CloudType >::~NonSphereDragForce().

virtual 
Calculate the noncoupled force.
Reimplemented from ParticleForce< CloudType >.
Definition at line 90 of file NonSphereDragForce.C.
References forceSuSp::Sp(), Foam::sqr(), and Foam::Zero.
Referenced by NonSphereDragForce< CloudType >::clone(), and NonSphereDragForce< CloudType >::~NonSphereDragForce().

protected 
Ratio of surface of sphere having same volume as particle to.
actual surface area of particle (0 < phi <= 1)
Definition at line 83 of file NonSphereDragForce.H.

protected 
Definition at line 88 of file NonSphereDragForce.H.

protected 
Definition at line 90 of file NonSphereDragForce.H.

protected 
Definition at line 92 of file NonSphereDragForce.H.

protected 
Definition at line 94 of file NonSphereDragForce.H.