When the Reynolds number approaches infinity, what happens to the boundary layer thickness?(a) Approaches infinity(b) Approaches zero(c) Approaches once(d) Remains sameI have been asked this question during an online interview.This intriguing question originated from Boundary Layer Properties in chapter Boundary Layers, Laminar & Turbulent Boundary Layers, Navier Stokes Solutions of Aerodynamics

When the Reynolds number approaches infinity, what happens to the boun

1.	When the Reynolds number approaches infinity, what happens to the boundary layer thickness?(a) Approaches infinity(b) Approaches zero(c) Approaches once(d) Remains sameI have been asked this question during an online interview.This intriguing question originated from Boundary Layer Properties in chapter Boundary Layers, Laminar & Turbulent Boundary Layers, Navier Stokes Solutions of Aerodynamics
Answer» The correct ANSWER is (b) Approaches zero Explanation: As the Reynolds number INCREASES, the boundary LAYER thickness decreases when compared to the length of the body. Usually for very large AIRCRAFTS, the value of \(\frac {δ}{L}\) is AROUND 0.01 which is a very small value. So hypothetically, as Re ➔ ∞, δ ➔ 0.

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