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For laminar film condensation on a vertical plate, the local heat transfer coefficient at the lower edge of the plate is given by
  • a)
    [k 3 p 2 g h f g /4 δ l (t sat – t s)] 0.25
  • b)
    [k 3 p 2 g h f g /4 δ l (t sat – t s)] 0.5
  • c)
    [k 3 p 2 g h f g /4 δ l (t sat – t s)] 0.1
  • d)
    [k 3 p 2 g h f g /4 δ l (t sat – t s)] 0.125
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
For laminar film condensation on a vertical plate, the local heat tran...
The rate of condensation heat transfer is higher at the upper end of the plate than at the lower end.
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For laminar film condensation on a vertical plate, the local heat tran...
B) k(3p^2g/4hf)^0.25

The local heat transfer coefficient at the lower edge of the plate for laminar film condensation can be calculated using the following equation:

h = k(3p^2g/4hf)^0.25

where:
h is the local heat transfer coefficient
k is the thermal conductivity of the condensing fluid
p is the density of the condensing fluid
g is the acceleration due to gravity
hf is the latent heat of vaporization

Therefore, the correct answer is b) k(3p^2g/4hf)^0.25.
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