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Which consequence results when boundary layer transition occurs in subsonic flow?

A)Reduced skin friction drag results
B)Premature flow separation from surface
C)Increased laminar sublayer thickness
D)Decreased pressure gradient sensitivity

💡 Explanation

Boundary layer transition to turbulence causes premature flow separation, because increased mixing raises the kinetic energy near the wall, therefore separation happens earlier rather than remaining attached, because the momentum of turbulent boundary layers diffuses to overcome adverse pressure gradients longer under similar conditions.

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