Repeat Problem 6-109 for heating water at 21oC.
Problem 6-109
Compare the Nusselt number results for heating air in a smooth tube at 300 K and Reynolds numbers of 50,000 and 100,000, as calculated from Equation (6-4a), (6-4b), and (6-4c). What do you conclude from these results?
Equation (6-4a)

Equation (6-4b)

for 0.5

Transcribed Image Text:

Nud = 0.023 Rea8 Pr0.4 Nu 0.0214(Re0.8 - 100)Pr04