Standard k-epsilon model
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For turbulent kinetic energy <math> k </math> <br> | For turbulent kinetic energy <math> k </math> <br> |
Revision as of 15:16, 21 June 2007
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