Question

Eddy viscosity is a turbulent transfer of _________

(a) Fluid

(b) Heat

(c) Momentum

(d) Pressure

This question was posed to me in an international level competition.

I'd like to ask this question from Basic Equations of Compressible Flow topic in portion Compressible Flow of Fluid Mechanics

Answer 1

Right option is (c) Momentum

For explanation: Eddy viscosity is a turbulent transfer of momentum by eddies. It gives rise to an internal fluid friction. It is in analogous to the action of molecular viscosity in laminar fluid flow. Eddy viscosity takes place on a large scale.