Question

Though the applicability of the realizable k-ε model and the RNG k-ε model are almost the same, the realizable k-ε model is ___________ when compared to the RNG k-ε model.

(a) more accurate and converges easily

(b) more stable

(c) linear

(d) more consistent

The question was posed to me in a national level competition.

My doubt stems from Turbulence Modelling in division Turbulence Modelling of Computational Fluid Dynamics

Answer 1

Right choice is (a) more accurate and converges easily

Easy explanation: The realizable k-ε model and the RNG k-ε model have the same benefits and applications. But, the realizable model gives more accurate results and it is easy to converge when compared to the RNG k-ε model.