Particle-drag model wherein drag forces (per unit carrier-fluid velocity) are dynamically computed by using sphereDrag
model; however, are corrected for particle distortion by linearly varying the drag between of a sphere (i.e. sphereDrag
) and a value of 1.54 corresponding to a disk.
More...
Public Member Functions | |
TypeName ("distortedSphereDrag") | |
Runtime type information. More... | |
DistortedSphereDragForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict) | |
Construct from mesh. More... | |
DistortedSphereDragForce (const DistortedSphereDragForce< CloudType > &df) | |
Construct copy. More... | |
virtual autoPtr< ParticleForce< CloudType > > | clone () const |
Construct and return a clone. More... | |
void | operator= (const DistortedSphereDragForce< CloudType > &)=delete |
No copy assignment. More... | |
virtual | ~DistortedSphereDragForce ()=default |
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 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 reference 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... | |
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... | |
Particle-drag model wherein drag forces (per unit carrier-fluid velocity) are dynamically computed by using sphereDrag
model; however, are corrected for particle distortion by linearly varying the drag between of a sphere (i.e. sphereDrag
) and a value of 1.54 corresponding to a disk.
with
where
= | Drag force per carrier-fluid velocity [kg/s] | |
= | Particle drag coefficient | |
= | Sphere drag coefficient | |
= | Particle Reynolds number | |
= | Particle mass density | |
= | Particle diameter | |
= | Level of distortion determined by other models internally |
Constraints:
References:
Standard model: Putnam, A. (1961). Integratable form of droplet drag coefficient. ARS Journal, 31(10), 1467-1468. Standard model (tag:AOB): Amsden, A. A., O'Rourke, P. J., & Butler, T. D. (1989). KIVA-II: A computer program for chemically reactive flows with sprays (No. LA-11560-MS). Los Alamos National Lab.(LANL), Los Alamos, NM (United States). DOI:10.2172/6228444 Expression correcting drag for particle distortion (tag:LMR): Liu, A. B., Mather, D., & Reitz, R. D. (1993). Modeling the effects of drop drag and breakup on fuel sprays. SAE Transactions, 83-95. DOI:10.4271/930072
constant/<CloudProperties>
: subModels { particleForces { distortedSphereDrag; } }
where the entries mean:
Property | Description | Type | Reqd | Deflt |
---|---|---|---|---|
type | Type name: distortedSphereDrag | word | yes | - |
Definition at line 168 of file DistortedSphereDragForce.H.
DistortedSphereDragForce | ( | CloudType & | owner, |
const fvMesh & | mesh, | ||
const dictionary & | dict | ||
) |
Construct from mesh.
Definition at line 46 of file DistortedSphereDragForce.C.
DistortedSphereDragForce | ( | const DistortedSphereDragForce< CloudType > & | df | ) |
Construct copy.
Definition at line 58 of file DistortedSphereDragForce.C.
|
virtualdefault |
Destructor.
TypeName | ( | "distortedSphereDrag" | ) |
Runtime type information.
|
inlinevirtual |
Construct and return a clone.
Reimplemented from ParticleForce< CloudType >.
Definition at line 208 of file DistortedSphereDragForce.H.
|
delete |
No copy assignment.
|
virtual |
Calculate the coupled force.
Reimplemented from ParticleForce< CloudType >.
Definition at line 70 of file DistortedSphereDragForce.C.
References Foam::clamp(), p, Foam::Re(), Foam::sqr(), y, and Foam::Zero.
Copyright © 2011-2018 OpenFOAM | OPENFOAM® is a registered trademark of OpenCFD Ltd.