Public Member Functions | List of all members
HarrisCrighton Class Reference

Inter-particle stress model of Harris and Crighton. More...

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Public Member Functions

 TypeName ("HarrisCrighton")
 Runtime type information. More...
 
 HarrisCrighton (const dictionary &dict)
 Constructors. More...
 
 HarrisCrighton (const HarrisCrighton &hc)
 Construct copy. More...
 
virtual autoPtr< ParticleStressModel > clone () const
 Clone. More...
 
virtual ~HarrisCrighton ()
 Destructor. More...
 
tmp< Field< scalar > > tau (const Field< scalar > &alpha, const Field< scalar > &rho, const Field< scalar > &uRms) const
 Member Functions. More...
 
tmp< Field< scalar > > dTaudTheta (const Field< scalar > &alpha, const Field< scalar > &rho, const Field< scalar > &uRms) const
 Collision stress derivative w.r.t. the volume fraction. More...
 
- Public Member Functions inherited from ParticleStressModel
 TypeName ("particleStressModel")
 Runtime type information. More...
 
 declareRunTimeSelectionTable (autoPtr, ParticleStressModel, dictionary,(const dictionary &dict),(dict))
 Declare runtime constructor selection table. More...
 
 ParticleStressModel (const dictionary &dict)
 Constructors. More...
 
 ParticleStressModel (const ParticleStressModel &sm)
 Construct a copy. More...
 
virtual ~ParticleStressModel ()
 Destructor. More...
 
scalar alphaPacked () const
 Member Functions. More...
 
tmp< FieldField< Field, scalar > > tau (const FieldField< Field, scalar > &alpha, const FieldField< Field, scalar > &rho, const FieldField< Field, scalar > &uRms) const
 Collision stress using FieldFields. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from ParticleStressModel
static autoPtr< ParticleStressModel > New (const dictionary &dict)
 Selector. More...
 
- Protected Attributes inherited from ParticleStressModel
scalar alphaPacked_
 Close pack volume fraction. More...
 

Detailed Description

Inter-particle stress model of Harris and Crighton.

The stress value takes the following form:

\[ \frac{P_s \alpha^\beta}{ \mathrm{max} \left( \alpha_{pack} - \alpha , \epsilon ( 1 - \alpha ) \right) } \]

Here, $\alpha$ is the volume fraction of the dispersed phase, and the other values are modelling constants. A small value $\epsilon$ is used to limit the denominator to ensure numerical stability.

Reference: 

    "Solitons, solitary waves, and voidage disturbances in gas-fluidised
    beds"
    S Harris and D Crighton,
    Journal of Fluid Mechanics
    Volume 266, Pages 243-276, 1994
Source files

Definition at line 68 of file HarrisCrighton.H.

Constructor & Destructor Documentation

◆ HarrisCrighton() [1/2]

HarrisCrighton ( const dictionary &  dict)

Constructors.

Construct from components

Definition at line 50 of file HarrisCrighton.C.

Referenced by HarrisCrighton::clone().

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◆ HarrisCrighton() [2/2]

HarrisCrighton ( const HarrisCrighton &  hc)

Construct copy.

Definition at line 62 of file HarrisCrighton.C.

◆ ~HarrisCrighton()

~HarrisCrighton ( )
virtual

Destructor.

Definition at line 75 of file HarrisCrighton.C.

References alpha(), Foam::max(), and HarrisCrighton::tau().

Referenced by HarrisCrighton::clone().

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Member Function Documentation

◆ TypeName()

TypeName ( "HarrisCrighton"  )

Runtime type information.

◆ clone()

virtual autoPtr<ParticleStressModel> clone ( ) const
inlinevirtual

Clone.

Implements ParticleStressModel.

Definition at line 105 of file HarrisCrighton.H.

References HarrisCrighton::dTaudTheta(), HarrisCrighton::HarrisCrighton(), rho, HarrisCrighton::tau(), and HarrisCrighton::~HarrisCrighton().

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◆ tau()

Foam::tmp< Foam::Field< Foam::scalar > > tau ( const Field< scalar > &  alpha,
const Field< scalar > &  rho,
const Field< scalar > &  uRms 
) const
virtual

Member Functions.

Collision stress

Implements ParticleStressModel.

Definition at line 100 of file HarrisCrighton.C.

References HarrisCrighton::dTaudTheta(), and Foam::pow().

Referenced by HarrisCrighton::clone(), and HarrisCrighton::~HarrisCrighton().

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◆ dTaudTheta()

Foam::tmp< Foam::Field< Foam::scalar > > dTaudTheta ( const Field< scalar > &  alpha,
const Field< scalar > &  rho,
const Field< scalar > &  uRms 
) const
virtual

Collision stress derivative w.r.t. the volume fraction.

Implements ParticleStressModel.

Definition at line 117 of file HarrisCrighton.C.

References Foam::pow().

Referenced by HarrisCrighton::clone(), and HarrisCrighton::tau().

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