Nonlinear eddy viscosity models
From CFD-Wiki
This is class of turbulence models for the RANS equations in which an eddy viscosity coefficient is used to relate the mean turbulence field to the mean velocity field, however in a nonlinear relationship
where
- is a nonlinear function possibly dependent on the mean strain and vorticity fields or even other turbulence variable
- is the coefficient termed turbulence "viscosity" (also called the eddy viscosity)
- is the mean strain rate
- is the mean vorticity