A tube bank employs tubes that are 1.30 cm in outside diameter at . There are eight rows of tubes, which are held at a surface temperature of 90 C. Air, at atmospheric pressure and a bulk temperature...

A tube bank employs tubes that are 1.30 cm in outside diameter at
. There are eight rows of tubes, which are held at a surface temperature of 90C. Air, at atmospheric pressure and a bulk temperature 27C, flows normal to the tubes with a free stream velocity of 1.25 m/s. The tube bank is eight rows deep, and the tubes are 1.8 m long. Estimate the heattransfer coefficient.