The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) ?
Correct answer: C. (ΔT)3
- A. (ΔT)2
- B. (ΔT)4
- C. (ΔT)3
- D. √(ΔT)
Explanation
In the nucleate-boiling region, empirical boiling correlations commonly give heat flux approximately proportional to the cube of excess temperature, q'' ∝ (ΔT)^3. This is why the cubic option is used rather than the lower powers.
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