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For filmwise condensation on a vertical plane; the film thickness 5 and heat transfer coefficient h vary with distance* from the leading edge as
  • a)
    δ decreases, h increases
  • b)
    both δ and h increases
  • c)
    δ increases, h decreases
  • d)
    both δ and h decreas
Correct answer is option 'C'. Can you explain this answer?
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Explanation:

Given Information:
- Film thickness (δ) and heat transfer coefficient (h) vary with distance* from the leading edge.
- We are looking for the relationship between δ and h in filmwise condensation on a vertical plane.

Analysis of Options:
a) δ decreases, h increases:
- If the film thickness decreases, it usually indicates that the liquid film is becoming thinner.
- If the heat transfer coefficient increases, it means heat transfer is improving.
- This scenario is not typical for filmwise condensation where the film thickness usually increases as condensation occurs.

b) Both δ and h increases:
- This scenario is also unlikely as filmwise condensation typically involves the film thickness increasing as more condensation occurs.

c) δ increases, h decreases:
- In filmwise condensation, as more condensation occurs, the film thickness typically increases.
- As the film thickness increases, the heat transfer coefficient usually decreases due to the thicker insulating liquid film formed on the surface.

d) Both δ and h decreases:
- This scenario is not typical for filmwise condensation, as both film thickness and heat transfer coefficient usually increase as more condensation occurs.

Therefore, the correct answer is option 'c' where the film thickness (δ) increases, and the heat transfer coefficient (h) decreases as distance increases from the leading edge in filmwise condensation on a vertical plane.
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For filmwise condensation on a vertical plane; the film thickness 5 and heat transfer coefficient h vary with distance* from the leading edge asa)δ decreases, h increasesb)both δ and h increasesc)δ increases, h decreasesd)both δ and h decreasCorrect answer is option 'C'. Can you explain this answer?
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