Particle-drag model wherein drag forces (per unit carrier-fluid velocity) are dynamically computed based on empirical expressions. More...
Public Member Functions | |
TypeName ("sphereDrag") | |
Runtime type information. More... | |
SphereDragForce (CloudType &owner, const fvMesh &mesh, const dictionary &dict) | |
Construct from mesh. More... | |
SphereDragForce (const SphereDragForce< CloudType > &df) | |
Construct copy. More... | |
virtual autoPtr< ParticleForce< CloudType > > | clone () const |
Construct and return a clone. More... | |
void | operator= (const SphereDragForce< CloudType > &)=delete |
No copy assignment. More... | |
virtual | ~SphereDragForce ()=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 autoPtr< ParticleForce< CloudType > > | clone () const |
Construct and return a clone. 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 | 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... | |
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 based on empirical expressions.
\[ \mathrm{F}_\mathrm{D} = \frac{3}{4} \frac{\mu_c\,\mathrm{C}_\mathrm{D}\,\mathrm{Re}_p}{\rho_p \, d_p^2} \]
with
\[ \mathrm{C}_\mathrm{D} = \frac{24}{\mathrm{Re}_p} \left(1 + \frac{1}{6}\mathrm{Re}_p^{2/3} \right) \quad \mathrm{if} \quad \mathrm{Re}_p \leq 1000 \]
\[ \mathrm{C}_\mathrm{D} = 0.424 \quad \mathrm{if} \quad \mathrm{Re}_p > 1000 \]
and
\[ \mathrm{Re}_p = \frac{\rho_c \, | \mathbf{u}_\mathrm{rel} | \, d_p}{\mu_c} \]
where
\( \mathrm{F}_\mathrm{D} \) | = | Drag force per carrier-fluid velocity [kg/s] |
\( \mathrm{C}_\mathrm{D} \) | = | Particle drag coefficient |
\( \mathrm{Re}_p \) | = | Particle Reynolds number |
\( \rho_p \) | = | Particle mass density |
\( \mu_c \) | = | Dynamic viscosity of carrier at the cell occupying particle |
\( d_p \) | = | Particle diameter |
\( \rho_c \) | = | Density of carrier at the cell occupying particle |
\( \mathbf{u}_\mathrm{rel} \) | = | Relative velocity between particle and carrier |
Constraints:
References:
Standard model: Putnam, A. (1961). Integratable form of droplet drag coefficient. ARS Journal, 31(10), 1467-1468. Expressions (tag:AOB), (Eq. 34-35): 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
constant/<CloudProperties>
: subModels { particleForces { sphereDrag; } }
where the entries mean:
Property | Description | Type | Reqd | Deflt |
---|---|---|---|---|
type | Type name: sphereDrag | word | yes | - |
Definition at line 177 of file SphereDragForce.H.
SphereDragForce | ( | CloudType & | owner, |
const fvMesh & | mesh, | ||
const dictionary & | dict | ||
) |
Construct from mesh.
Definition at line 49 of file SphereDragForce.C.
SphereDragForce | ( | const SphereDragForce< CloudType > & | df | ) |
Construct copy.
Definition at line 61 of file SphereDragForce.C.
|
virtualdefault |
Destructor.
TypeName | ( | "sphereDrag" | ) |
Runtime type information.
|
inlinevirtual |
Construct and return a clone.
Reimplemented from ParticleForce< CloudType >.
Definition at line 207 of file SphereDragForce.H.
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delete |
No copy assignment.
|
virtual |
Calculate the coupled force.
Reimplemented from ParticleForce< CloudType >.
Definition at line 73 of file SphereDragForce.C.
References p, Foam::Re(), Foam::sqr(), and Foam::Zero.