This section outlines the definitions of the turbulent velocity scale and turbulent time scale which are provided by the different turbulence models for use in other physical models. The turbulent length scale, , is then calculated based on the turbulent velocity and time scale in the following way:

(4–446)

The velocity scale is defined as the velocity scale of the modeled turbulence () limited by the Kolmogorov microscale ():

(4–447)

In a similar way, the turbulent time scale can be defined:

(4–448)