Question Solved1 Answer 4.21. Air at 20 kPa and 5°C enters a 1.5-cm diameter tube at a uniform velocity of 1.5m/s. The tube walls are maintained at a uniform temperature of 45°C. Estimate the distance from the entrance at which the flow becomes fully developed.

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Transcribed Image Text: 4.21. Air at 20 kPa and 5°C enters a 1.5-cm diameter tube at a uniform velocity of 1.5m/s. The tube walls are maintained at a uniform temperature of 45°C. Estimate the distance from the entrance at which the flow becomes fully developed.
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Transcribed Image Text: 4.21. Air at 20 kPa and 5°C enters a 1.5-cm diameter tube at a uniform velocity of 1.5m/s. The tube walls are maintained at a uniform temperature of 45°C. Estimate the distance from the entrance at which the flow becomes fully developed.
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qolution{:[d=(rho xx v)/(mu)((delta)/(4.64))^(2)],[V=1.5m//squad mu=1.864 xx10^(-5)Ns//m^(2)],[delta=(" diameter of ")/(2)" tule "=(1.5(cm))/(2)],[de ... See the full answer