PROBLEM 5

Problem 11.12. Water, at 1 bar pressure and a mean temperature of 40°C flows in a horizontal pipe that

is 5 cm in diameter. The mean velocity is such that Rep = 2.1 x 10³. The flow is thermally developed.

The pipe is subject to UHF boundary conditions, such that Gr=3×106. The pipe is made of stainless

steel, and is 3.5 mm thick.

Calculate the wall surface temperature, Ts, using the correlation of Morcos and Bergles (1975). Examine

whether the application of this correlation is justified.