A fluid at 27°C flows with a velocity of 10 m/s across a 5 cm outer diameter tube whose surface is kept at a uniform temperature of 120°C. Determine the average heat transfer coefficients and the heat...

A fluid at 27°C flows with a velocity of 10 m/s across a 5 cm outer diameter tube whose surface is kept at a uniform temperature of 120°C. Determine the average heat transfer coefficients and the heat transfer rates per metre length of the tube for (a) air at atmospheric pressure, (b) water and (c) ethylene glycol.