Project ForgeFluid Mechanics
Bernoulli's Equation & Flow
GATE 2021
Easy
Which of the following is responsible for eddy viscosity (or turbulent viscosity) in a turbulent boundary layer on a flat plate?
- ANikuradse stresses
- Reynolds stresses
- CBoussinesq stresses
- DPrandtl stresses
Explanation
Turbulent (eddy) viscosity arises from the additional apparent stresses due to velocity fluctuations in turbulent flow — the Reynolds stresses, which appear as extra terms when the Navier-Stokes equations are time-averaged.
Source: GATE ME 2021 Session 2 (ME-2) (2021)
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