Inter-particle stress model of Lun et al. More...
Public Member Functions | |
| TypeName ("Lun") | |
| Runtime type information. More... | |
| Lun (const dictionary &dict) | |
| Constructors. More... | |
| Lun (const Lun &hc) | |
| Construct copy. More... | |
| virtual autoPtr< ParticleStressModel > | clone () const |
| Clone. More... | |
| virtual | ~Lun () |
| 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... | |
Inter-particle stress model of Lun et al.
The stress value takes the following form:
\[ \left( \alpha \rho + \alpha^2 \rho (1 + e) \frac{3}{5} \left( 1 - \left( \frac{\alpha}{\alpha_{pack}} \right)^\frac{1}{3} \right) \right) \frac{1}{3} \sigma^2 \]
Here, \(\alpha\) is the volume fraction of the dispersed phase, \(\rho\) is the density of the dispersed phase, \(e\) is a coefficient of restitution, and \(\sigma\) is the RMS velocity fluctuation.
Reference:
"Kinetic theories for granular flow: inelastic particles in Couette
flow and slightly inelastic particles in a general flowfield"
C Lun, S Savage, G Jeffrey, N Chepurniy
Journal of Fluid Mechanics
Volume 140, Pages 223-256, 1984
| Lun | ( | const dictionary & | dict | ) |
Constructors.
Construct from components
Definition at line 52 of file Lun.C.
Referenced by Lun::clone().
| TypeName | ( | "Lun" | ) |
Runtime type information.
|
inlinevirtual |
Clone.
Implements ParticleStressModel.
Definition at line 102 of file Lun.H.
References Lun::Lun().
|
virtual |
Member Functions.
Collision stress
Implements ParticleStressModel.
Definition at line 83 of file Lun.C.
References Foam::constant::atomic::alpha, Foam::cbrt(), Foam::max(), and rho.
|
virtual |
Collision stress derivative w.r.t. the volume fraction.
Implements ParticleStressModel.
Definition at line 107 of file Lun.C.
References NotImplemented.
1.8.17