The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is______________?
Correct answer: C. 3.66
- A. 1.66
- B. 88.66
- C. 3.66
- D. Dependent on NRe only
Explanation
For fully developed laminar flow in a circular tube with constant wall temperature, the Nusselt number reaches the standard limiting value of 3.66. It is not dependent on Reynolds number once the flow is fully developed.
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