Question

What does the name k-ε model signify?

(a) The seven extra transport equations used in the model

(b) The variation of k and ε with the flow variables

(c) The variation of k with ε

(d) The two extra transport equations used in the model

I had been asked this question during an interview.

This key question is from Turbulence Modelling in division Turbulence Modelling of Computational Fluid Dynamics

Answer 1

Correct answer is (d) The two extra transport equations used in the model

The best I can explain: k-ε is a turbulence model used to supplement the RANS equations in overcoming its non-linearity. This model uses two additional transport equations which govern the transport of k and ε.