Question

Which of these models is made different from its parent model by turbulent viscosity?

(a) Realizable k-ε model

(b) k-ε model

(c) Spalart-Allmaras model

(d) SST model

This question was posed to me in class test.

My question is from Turbulent Viscosity in chapter Turbulence Modelling of Computational Fluid Dynamics

Answer 1

Correct choice is (a) Realizable k-ε model

Explanation: The realizable k-ε model is a variant of the k-ε model. The realizable k-ε model is different from its parent that a new turbulent viscosity is formulated. Another variation is that a new transport equation for the dissipation rate is formed.