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Which outcome results when Reynolds number bypasses a heat exchanger's design limits?

A)Decreased thermal boundary layer thickness
B)Increased heat transfer surface defects
C)Premature laminar flow destabilization onset
D)Elevated system-wide fluid kinematic viscosity ratings

💡 Explanation

Increased fluid velocity leading to higher Reynolds number triggers turbulent flow; the mechanism is turbulent transition. This turbulent flow causes decreased thermal boundary layer thickness because momentum diffusivity rises rather than stable laminar boundaries that reduce efficient heat exchange.

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