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← ScienceWhich mechanism sharply increases drag on wings when Reynolds number exceeds a critical threshold?
A)Boundary layer turbulent transition✓
B)Increased molecular cohesive sticking
C)Reverse pressure gradient buildup
D)Laminar skin-friction reduction
💡 Explanation
Increased Reynolds number promotes Boundary layer turbulent transition from laminar to turbulent flow over the wing surface, because the inertia forces dominate viscous forces destabilizing the boundary layer; therefore, drag increases significantly rather than remaining low because laminar flow causes less friction.
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