Standard k-epsilon model
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Contents |
Transport equations for standard k-epsilon model
For turbulent kinetic energy
For dissipation
Modeling turbulent viscosity
Turbulent viscosity is modelled as:
Production of k
Where is the modulus of the mean rate-of-strain tensor, defined as :
Effect of buoyancy
where Prt is the turbulent Prandtl number for energy and gi is the component of the gravitational vector in the ith direction. For the standard and realizable - models, the default value of Prt is 0.85.
The coefficient of thermal expansion, , is defined as
Model constants
Note: depends on the literature being followed and is meant to be used only with the term. Possible values, depending on literature reference:
Reference | Constant | Comments |
---|---|---|
unknown | Note to OpenFOAM users: do not confuse this constant with the one used in their implementations of the k-epsilon turbulence models. Their implementation is different. |
References
See section References in the parent page K-epsilon models.