Question

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The effectiveness of a fin will be maximum in an environment with

  1. Free convection
  2. Forced convection
  3. Radiation
  4. Convection and radiation

Answer (Detailed Solution Below)

Option 1 : Free convection
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Detailed Solution

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Explanation:

How effectively a fin can enhance heat transfer is characterized by the fin effectiveness, e, which is the ratio of fin heat transfer and the heat transfer without the fin. Effectiveness of the fin is given by

Hence,  

Since hforced conv > hfree conv

Hence, Effectiveness of the fin will be more in free convection than forced convection.

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