Question

The units of kinematic and dynamic turbulent viscosities are ___________ respectively.

(a) m/s^2 and kg m/s

(b) m^2/s^2 and kg/m s

(c) m^3/s  and kg m/s

(d) m^2/s  and kg/m s

I have been asked this question during an interview.

My query is from Turbulent Viscosity topic in portion Turbulence Modelling of Computational Fluid Dynamics

Answer 1

Right answer is (d) m^2/s  and kg/m s

For explanation: The units of turbulent viscosities are the same as the viscosities given by Newton’s law. The unit of kinematic turbulent viscosity is m^2/s. The unit of dynamic viscosity is kg/m s.