Question

In high Reynolds number turbulent flows _______________ terms dominate.

(a) diffusion terms

(b) convection terms

(c) viscous stress terms

(d) turbulent effect terms

I have been asked this question during an internship interview.

My question is based upon Turbulence Modelling in division Turbulence Modelling of Computational Fluid Dynamics

Answer 1

Correct answer is (d) turbulent effect terms

For explanation I would say: In high Reynolds number flows, the difference between the length scales will be very high. The large eddies are more energetic. So, the turbulent effect terms are much larger than the viscous stress terms in high Reynolds number flows.