Question

Turbulent Schmidt number is the ratio of ____________

(a) turbulent viscosity to turbulent diffusivity

(b) turbulent diffusivity to turbulent viscosity

(c) turbulent rate to turbulent diffusivity

(d) turbulent diffusivity to turbulent rate

The question was posed to me during an interview.

This key question is from Turbulent Schmidt Number topic in section Turbulence Modelling of Computational Fluid Dynamics

Answer 1

Correct answer is (a) turbulent viscosity to turbulent diffusivity

Explanation: Turbulent Schmidt number gives the ratio of turbulent transfer of momentum to the turbulent transfer of mass. It is given by

Turbulent Schmidt number=\(\frac{Turbulent\, viscosity}{Turbulent\, diffusivity}\).