Air at a temperature of 300 C flows with a velocity of 10 m/s over a...
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Air at a temperature of 300 C flows with a velocity of 10 m/s over a flat plate 0.5 m long. Average Nusselt number to maintain plate-surface temperature at 27 C is calculated to be 57.4 by the equation given below: Nu, = 0.664 Re/2Pr1/3 = 57.4 Find the percentage of changes in the average heat convection coefficient for each of the following cases (assuming that everything else is the same as given in the problem statement): (a) When air velocity (u) is increased 4-fold? (b) When plate-length (L) is increased 4-fold? (c) When the heat conduction coefficient of the plate (kpl) is increased 4-fold? Air at a temperature of 300 C flows with a velocity of 10 m/s over a flat plate 0.5 m long. Average Nusselt number to maintain plate-surface temperature at 27 C is calculated to be 57.4 by the equation given below: Nu, = 0.664 Re/2Pr1/3 = 57.4 Find the percentage of changes in the average heat convection coefficient for each of the following cases (assuming that everything else is the same as given in the problem statement): (a) When air velocity (u) is increased 4-fold? (b) When plate-length (L) is increased 4-fold? (c) When the heat conduction coefficient of the plate (kpl) is increased 4-fold?
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The question presents a scenario where air flows over a flat plate and the Nusselt number is used to calculate the convective heat transfer coefficient The Nusselt number is given by the following dim... View the full answer
Related Book For
Principles of heat transfer
ISBN: 978-0495667704
7th Edition
Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn
Posted Date:
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