Multiple choice general knowledge science & technology

What is the dimensionless number associated with fin effectiveness??

  1. Biot No.

  2. Prandtl No.

  3. Nusselt No.

  4. Reynolds No.
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Explanation

Biot number (Bi = hL/k) characterizes the ratio of internal thermal resistance to external convective resistance, making it the key dimensionless parameter for fin effectiveness. Prandtl number relates to momentum/thermal diffusion in fluids, Nusselt number to convective heat transfer coefficient, and Reynolds number to flow regimes - none directly measure fin performance.

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