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These rules for averaging are used to average ___________

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in Computational Fluid Dynamics by (118k points)
These rules for averaging are used to average ___________

(a) fluctuations in the turbulent flow

(b) variation in results of turbulent flow

(c) the coefficients in FVM

(d) the coefficients in FDM

This question was addressed to me during an interview for a job.

My question is taken from Turbulence Modelling topic in section Turbulence Modelling of Computational Fluid Dynamics

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Correct choice is (a) fluctuations in the turbulent flow

Easiest explanation: The flow variables in a turbulent flow are divided into mean and fluctuating components. These fluctuating components in the turbulent flow are averaged for the further solution of the system. These rules are used for averaging.

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