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← ScienceWhich risk increases when the Reynolds number in an aircraft's boundary layer exceeds a critical value?
A)Increase in convective heat transfer
B)Onset of turbulent flow✓
C)Reduction in skin friction drag
D)Increased laminar flow stability
💡 Explanation
Turbulent flow onset increases because the Reynolds number increase signifies inertial forces overwhelm viscous forces, instigating the instability characterized by *Turbulent Transition*; therefore, turbulence results rather than stable laminar flow because viscosity becomes less dominant.
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