Prandtl number is the reciprocal of____________________?
Correct answer: D. Thermal diffusivity/Momentum diffusivity
- A. Mass diffusivity × Momentum diffusivity
- B. Thermal diffusivity × Momentum
- C. Thermal diffusivity × Mass diffusivity
- D. Thermal diffusivity/Momentum diffusivity
Explanation
Prandtl number is the ratio of momentum diffusivity to thermal diffusivity, Pr = ν/α. Its reciprocal is therefore thermal diffusivity divided by momentum diffusivity.
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