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Reynolds averaging makes the conservation equations ____________

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in Computational Fluid Dynamics by (118k points)
Reynolds averaging makes the conservation equations ____________

(a) non-conservative

(b) non-linear

(c) unstable

(d) inconsistent

This question was posed to me in an online interview.

The doubt is from Turbulence Modelling topic in chapter Turbulence Modelling of Computational Fluid Dynamics

1 Answer

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Best answer
Right choice is (b) non-linear

The best explanation: Reynolds averaging add extra terms to the conservation equations. So, the number of unknowns becomes more than the number of equations. This leads to a linearity problem and makes the conservative equations non-linear.

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