Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is_________________?
Correct answer: B. < 1
- A. 1
- B. < 1
- C. > 1
- D. > 5
Explanation
When Prandtl number is less than 1, momentum diffuses more slowly than heat, so the thermal boundary layer becomes thicker than the hydrodynamic boundary layer. For Pr > 1, the thermal layer is thinner.
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