A fluid is flowing inside the inner tube of a double pipe heat exchanger with di

Question

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to

Options:

A . D0.8

B . D-0.2

C . D-1

D . D-1.8

Answer: Option B

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