Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is_______________?
Correct answer: C. 0.6
- A. 0.2
- B. 0.4
- C. 0.6
- D. 0.8
Explanation
For a turbulent core at a Prandtl number around 0.6, turbulent eddy transport is much greater than molecular conduction, so direct conduction is treated as negligible. This value is also typical of many liquid or gas systems used in such correlations.
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