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Mechanical Engineering QUESTION #2428
Question 1
The parameter \(m\) (fin parameter) for an extended surface (fin) with perimeter \(P\), cross-sectional area \(A_c\), convection coefficient \(h\), and conductivity \(k\) is:
  • \(m = \sqrt{hP/(kA_c)}\)✔️
  • \(m = hP \cdot kA_c\)
  • \(m = \sqrt{kA_c/(hP)}\)
  • \(m = h/(kP A_c)\)
Correct Answer Explanation
The fin parameter \(m=\sqrt{hP/(kA_c)}\) (m⁻¹) governs the exponential temperature decay along the fin.