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At high Reynolds numbers, the first wall damping function becomes ___________

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At high Reynolds numbers, the first wall damping function becomes ___________

(a) -1

(b) 1

(c) 0

(d) ∞

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The query is from Turbulence Modelling topic in portion Turbulence Modelling of Computational Fluid Dynamics

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Correct answer is (b) 1

To explain: The first wall damping function becomes one when we consider turbulent flows at high Reynolds numbers. This is because, at these Reynolds numbers, the kinematic eddy viscosity parameter value is close to the kinematic eddy viscosity.

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