Nusselt number is the ratio of the temperature gradient at the wall to_________________?
Correct answer: C. That across the entire pipe
- A. Temperature difference
- B. Heat flux
- C. That across the entire pipe
- D. None of these
Explanation
The Nusselt number compares the temperature gradient at the wall with the characteristic temperature gradient across the fluid, often expressed using the temperature difference across the pipe diameter. It is also written as Nu = hD/k.
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