For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus- Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of________________?

Question

Accepted Answer

1. The Dittus-Boelter correlation shows that the heat transfer coefficient depends on the Reynolds number and a power of the diameter. When these changes are applied, the overall factor change is 1.