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What is Reynolds stress?

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in Computational Fluid Dynamics by (118k points)
What is Reynolds stress?

(a) Stress due to velocity fluctuations

(b) Tangential component of pressure

(c) Stress due to pressure fluctuations

(d) Normal component of viscosity

I had been asked this question by my college professor while I was bunking the class.

The above asked question is from Turbulence Modelling topic in section Turbulence Modelling of Computational Fluid Dynamics

1 Answer

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Best answer
Right option is (a) Stress due to velocity fluctuations

Explanation: Turbulent flows are highly chaotic and unstable. The high fluctuation in the turbulent flows creates highly varying velocities. These velocities create additional stresses called Reynolds stress.

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