A long aluminum wire of diameter 3 mm is extruded at a temperature of 280°C. The wire is subjected to cross air flow at
Posted: Fri Jul 01, 2022 6:52 am
A long aluminum wire of diameter 3 mm is extruded at atemperature of 280°C. The wire is subjected to cross air flow at20°C at a velocity of 6.00 m/s. Determine the rate of heat transferfrom the wire to the air per meter length when it is first exposedto the air. The properties of air at 1 atm and the film temperatureof (Ts + T∞)/2 = (280 + 20)/2 = 150°C are k = 0.03443 W/m·°C, ν =2.860 × 10−5 m2/s, and Pr = 0.70275.
The rate of heat transfer from the wire to the air per meterlength when it is first exposed to the air is
The rate of heat transfer from the wire to the air per meterlength when it is first exposed to the air is