Question

The σk value used in the Shear Stress Transport model is ________

(a) -1

(b) 1

(c) 2

(d) -2

This question was posed to me by my college professor while I was bunking the class.

My doubt is from Turbulence Modelling in section Turbulence Modelling of Computational Fluid Dynamics

Answer 1

The correct answer is:

(b) 1

Explanation:

In the Shear Stress Transport (SST) turbulence model, the value of σk (which is a constant in the model for the turbulence kinetic energy equation) is typically set to 1. This value helps to balance the turbulence production and dissipation terms within the model, and it is part of the set of empirical constants used to refine the accuracy of the model in capturing turbulent flows.