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

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.	d 0.8
B.	d -0.2
C.	d -1
D.	d -1.8
Answer» C. d -1

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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

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