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The mathematical technique used to represent the random nature of the turbulent flow.

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The mathematical technique used to represent the random nature of the turbulent flow.

(a) RANS

(b) Reynolds decomposition

(c) Parallel decomposition

(d) DNS

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

I'd like to ask this question from Turbulence Modelling topic in division Turbulence Modelling of Computational Fluid Dynamics

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Best answer
Right choice is (b) Reynolds decomposition

Best explanation: The random nature of a turbulent flow needs a proper description of the motion of all the flow particles. Reynolds decomposition is used to represent this random nature. This decomposes the flow variables into two components.

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