Water enters a circular tube whose walls are maintained at constant temperature

Question

Water enters a circular tube whose walls are maintained at constant temperature at a specified flow rate and temperature. To compute the rate of heat transfer between the walls and the fluid, using the flow Nusselt number the following temperature difference is used; a. The difference between the inlet and b. The difference between the inlet outlet water bulk temperature water bulk temperature and the tube wall temperature c. The log mean temperature difference d. The difference between the average water bulk temperature and the tube temperature

Explanation / Answer

When the surface of the tube is maintained at constant temprature, log mean temprature diffrediff must be used to find the heat transfer.

The correct option is (c).(the log mean temprature difference)

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