1. Water enters a heated tube of 2 mm diameter at 30 C and
leaves the tube at 60 C. Find the water mass flow for the average Reynolds
number of 1000.
2. Air at 10 atm and 77 C flows in a duct of rectangular
cross section, 20 cm by 10 cm, at a rate of 0.001 kg/s. Find a) the flow regime
and b) the heat transfer coefficient. The duct is also at 77 C.
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