The equation, Nst = (f/2)/[1 + 5 (Npr - 1) √(f/2)], corresponds to ______________ analogy?
Correct answer: C. Prandtl
- A. Von-Karman
- B. Reynolds
- C. Prandtl
- D. Colburn
Explanation
The correction factor involving 5(Npr − 1)√(f/2) accounts for the difference between momentum and heat diffusivity in the Prandtl analogy. Reynolds analogy is the simpler St = f/2 form, while Colburn uses a Prandtl-number power correction.
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