Question: Consider the primitive LES and RANS models, in which the eddy viscosity formulas (11.32) and (11.77) are applied with constant eddy viscosity (mu_{t}). What is

Consider the primitive LES and RANS models, in which the eddy viscosity formulas (11.32) and (11.77) are applied with constant eddy viscosity $\mu_{t}$. What is the drawback of these models? Should we expect accurate results?

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