Question

When compared to the standard ε-equation, the transformed ω-equation has _________

(a) the same number of terms

(b) an extra dissipation term

(c) two extra source terms

(d) an extra source term

The question was posed to me in an interview.

I'd like to ask this question from Turbulence Modelling topic in section Turbulence Modelling of Computational Fluid Dynamics

Answer 1

The correct answer is (d) an extra source term

To explain: While transforming the ε-equation into the ω-equation, an extra source term arises. It is called the cross-diffusion term. This cross diffusion term is modified using external blending functions.