Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as______________________?
Correct answer: C. Re0.8, Re0.5
- A. Re0.5, Re0.8
- B. Re0.8, Re-0.5
- C. Re0.8, Re0.5
- D. Re-0.8, Re0.5
Explanation
For turbulent flow, the usual heat-transfer correlation gives Nu proportional to Re^0.8, while for laminar flow the dependence is approximately Re^0.5. Therefore the correct sequence is Re^0.8, Re^0.5.
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