Question

What does k and ε stand for?

(a) Turbulent kinetic energy and its dissipation rate per unit mass

(b) Turbulent kinetic energy and turbulent diffusivity

(c) Turbulent diffusivity and its dissipation rate per unit mass

(d) Turbulent kinetic energy and mass transfer

The question was asked in an internship interview.

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

Answer 1

Right option is (a) Turbulent kinetic energy and its dissipation rate per unit mass

To elaborate: In the k-ε model, the two additional equations govern the transport of turbulent kinetic energy (k) and the rate of dissipation of the turbulent kinetic energy (ε). The behaviour of turbulent flow is given in terms of these two properties in this model.