Air at 300 K and 1 atm enters an in-line tube bank consisting of five rows of

Question:

Air at 300 K and 1 atm enters an in-line tube bank consisting of five rows of 10 tubes each. The tube diameter is 2.5 cm and Sn = Sp = 5.0 cm. The incoming velocity is 10 m/s and the tube wall temperatures are constant at 350 K. Calculate the exit air temperature.