A fluid is flowing inside the inner tube of a double pipe heat exchang – McqOptions

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1.	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_____________________?
A.	d0.8
B.	d-0.2
C.	d-1
D.	d-1.8
Answer» C. d-1

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