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The RNG k-ε model makes assumptions for ___________

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The RNG k-ε model makes assumptions for ___________

(a) dynamic eddy viscosity

(b) kinematic eddy viscosity

(c) small-scale turbulence

(d) large-scale turbulence

I had been asked this question in final exam.

I would like to ask this question from Turbulence Modelling topic in chapter Turbulence Modelling of Computational Fluid Dynamics

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The correct option is (c) small-scale turbulence

The best I can explain: The statistical mechanics approach has led to new mathematical formalizations. A limited number of assumptions regarding the statistics of small scale turbulence is made in this RNG k-ε model.

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