At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?
Correct answer: A. > 0.6
- A. > 0.6
- B. < 0.5
- C. 0.5
- D. < 0.1
Explanation
For turbulent heat transfer, molecular conduction in the turbulent core is usually negligible when the Prandtl number is greater than about 0.6. Heat transport there is then dominated by turbulent mixing.
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