Air at 1.7 m/s is heated from 25 to 75°C in a thin-walled 19-mm-diameter 2-m-long tube. A uniform heat flux is maintaine

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Air At 1 7 M S Is Heated From 25 To 75 C In A Thin Walled 19 Mm Diameter 2 M Long Tube A Uniform Heat Flux Is Maintaine 1 (34.84 KiB) Viewed 77 times

Air at 1.7 m/s is heated from 25 to 75°C in a thin-walled 19-mm-diameter 2-m-long tube. A uniform heat flux is maintained by an electrical heater wrapped around the tube. For air use: p= 1.1 kg/m³, cp = 1005 J/kg°C, µ=0.000019 kg/m-s, k=0.028 W/m°C, Pr-0.70. Determine the (a) heat flux required The fluid enters with a uniform velocity profile and a uniform temperature profile. Determine the surface temperature of the tube (b) at a distance of 0.1 m from the entrance (c) at the tube exit