Question

The mixing length model links _____________ with _____________

(a) length scale with mean flow properties

(b) velocity scale with mean flow properties

(c) length scale with position coordinates

(d) velocity scale with position coordinates

This question was addressed to me during an interview.

This interesting question is from Mixing Length Turbulence Model in division Turbulence Modelling of Computational Fluid Dynamics

Answer 1

The correct option is (b) velocity scale with mean flow properties

Easiest explanation: The large eddies directly interact with the mean flow properties and extract energy from them. So, there is a strong connection between the mean flow properties and the behaviour of the large eddies. So, the velocity scale is linked with the mean flow properties.