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Which consequence results when rapid heating exceeds the Leidenfrost temperature?

A)Nucleate boiling efficiency drastically increases
B)Film boiling heat flux rapidly decreases
C)Convective heat transfer intensifies linearly
D)Thermal conduction dominates energy transfer

💡 Explanation

Reduced heat flux occurs via film boiling because exceeding the Leidenfrost point causes immediate vaporisation, creating an insulating layer. The mechanism is rapid phase transition; therefore heat transfer degrades, drastically reducing flux, rather than enhancing convection.

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