Question:
The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, \( \Delta T \) = temperature drop across condensate film)
The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, \( \Delta T \) = temperature drop across condensate film)
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In laminar film condensation: \( h \propto (\Delta T)^{-1/4} \)
Updated On: June 02, 2025
- \( (\Delta T)^2 \)
- \( \Delta T \)
- \( (\Delta T)^{1/2} \)
- \( (\Delta T)^{1/4} \)
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The Correct Option is D
Solution and Explanation
According to Nusselt’s theory, the condensation heat transfer coefficient is:
\[ h \propto \left( \frac{k^3 \rho^2 g h_{fg}}{\mu L \Delta T} \right)^{1/4} \]
\[ h \propto \left( \frac{k^3 \rho^2 g h_{fg}}{\mu L \Delta T} \right)^{1/4} \]
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