Project ForgeHeat Transfer
Convection & Radiation
GATE 2012
Easy
Which one of the following configurations has the highest fin effectiveness?
- Thin, closely spaced fins
- BThin, widely spaced fins
- CThick, widely spaced fins
- DThick, closely spaced fins
Explanation
Fin effectiveness is highest for thin fins (a thin cross-section gives a lower m=√(hP/kAc)-driven heat loss per unit base area ratio favoring higher effectiveness) placed close together (maximizing the number of fins, and hence total surface area, per unit base area) — thin, closely spaced fins.
Source: GATE ME 2012 (Booklet Code A) (2012)
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