Introduction to Turbulence Modeling

TURBULENT FLOW

Kolmogorov-Prandtl Expression

Eddy Viscosity

, c = const. 

Kinematic Viscosity

Let

For free shear flows

= half width

Close to a wall,

 (y = distance from the wall)

Local Equilibrium

For local equilibrium

Production = Dissipation

Mixing length Hypothesis