Question

The blending function used in the Shear Stress Transport model is a function of _____________

(a) Turbulent kinematic viscosity, the ratio of turbulence and distance from the wall

(b) Turbulence Reynolds number, turbulent kinematic viscosity and distance from the wall

(c) Turbulence Reynolds number, the ratio of turbulence and turbulent kinematic viscosity

(d) Turbulence Reynolds number, the ratio of turbulence and distance from the wall

The question was posed to me in an internship interview.

This intriguing question originated from Turbulence Modelling in portion Turbulence Modelling of Computational Fluid Dynamics

Answer 1

The correct choice is (d) Turbulence Reynolds number, the ratio of turbulence and distance from the wall

For explanation: The blending function is a function of lt/y and Rey. Where,

lt→ Ratio of turbulence.

y→ Distance from the wall.

Rey→ Reynolds number based on the y-distance.