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Mechanical Engineering QUESTION #2430
Question 1
For external forced convection over a flat plate, the local Nusselt number in the laminar boundary layer region is given by:
  • \(Nu_x = 0.332 \cdot Re_x^{1/2} \cdot Pr^{1/3}\)✔️
  • \(Nu_x = 0.023 \cdot Re_x^{0.8} \cdot Pr^{0.4}\)
  • \(Nu_x = Re_x \cdot Pr\)
  • \(Nu_x = 0.664 \cdot Re_x^{1/2} \cdot Pr^{1/3}\)
Correct Answer Explanation
For laminar flow over a flat plate (local value): \(Nu_x=0.332Re_x^{1/2}Pr^{1/3}\). Average over plate length \(L\): \(\overline{Nu}_L=0.664Re_L^{1/2}Pr^{1/3}\).