- Heat Transfer - Section 1
- Heat Transfer - Section 2
- Heat Transfer - Section 3
- Heat Transfer - Section 4
- Heat Transfer - Section 5
- Heat Transfer - Section 6
- Heat Transfer - Section 7
- Heat Transfer - Section 8
- Heat Transfer - Section 9
- Heat Transfer - Section 10
- Heat Transfer - Section 11


Heat Transfer - Engineering
Q1: 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 toA d0.8
B d-0.2
C d-1
D d-1.8
ANS:B - d-0.2 For turbulent flow conditions in the tube side of a double pipe heat exchanger, the tube side heat transfer coefficient (ht) is proportional to a power of the tube diameter (�d). This relationship is expressed by the Dittus-Boelter equation for turbulent flow: .2ht∝d−0.2 Therefore, the correct option is: d−0.2 |


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