Heat transfer co-efficient equation for forced convection, Nu = 0.023 R<sub>e</sub><sup>0.8</sup> . P<sub>r</sub>n, is not valid, if the value of

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Ram Sharma

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Q. Heat transfer co-efficient equation for forced convection, Nu = 0.023 R_e^0.8 . P_rn, is not valid, if the value of

(A) N = 0.3 is used for cooling
(B) N = 0.4 is used for heating
(C) Reynolds number for the flow involved is < 2100
(D) Reynolds number for the flow involved is > 10000

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✅ Correct Answer: (C) Reynolds number for the flow involved is < 2100

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