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Which outcome results as coolant flow transitions beyond laminar near the critical Reynolds number in a microchannel heat sink?

A)Increased temperature due to nucleate boiling
B)Reduced pressure from decreased dynamic viscosity
C)Elevated heat transfer due to turbulent mixing
D)Lower thermal resistance within wall conduction

💡 Explanation

Turbulent mixing increases heat transfer; the Reynolds number characterizes flow regime. Transition to turbulence triggers enhanced mixing because inertial forces dominate viscous forces, therefore heat transfer increases, rather than decreases by reduced pressure.

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