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L0#230 points
Atmospheric air enters the heated section of a circular tube at a flow rate of 0.005 kg/s and a temperature of 20°C. The tube is of diameter D = 50 mm, and fully developed conditions with h = 25 W/mK exist.
What is the value of the surface temperature at the tube inlet Ts,i and outlet Ts,o?
= 0.005 kg/s Tm/ = 20°C p = 1 atm
h = 25 W/m2K D = 0.05 m q = 1000 W/m2 or q = 500 W/m