Standard k-epsilon model
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- | C_{1 \epsilon} = 1. | + | C_{1 \epsilon} = 1.4, \;\; C_{2 \epsilon} = 1.92, \;\; C_{\mu} = 0.09, \;\; \sigma_k = 1.0, \;\; \sigma_{\epsilon} = 1.3 |
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Revision as of 12:44, 6 October 2005
Contents |
Transport Equations for standard k-epsilon model
For k
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 Bouyancy
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