In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.21 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the tube. If the tube is 10 m long, what is the required heat flux? If fluid enters the tube with a fully developed velocity profile and a uniform temperature profile, what is the surface temperature at the tube exit? Fluid properties may be approximated as p = 1000 kg/m, c, = 4000 J/kg-K, u = 2x 10-3 kg/s-m, k = 0.8 W/m-K, and Pr = 10.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.21 m/s through a straight
thin-walled stainless steel tube of 12.7-mm diameter. A uniform heat flux is maintained by an electric resistance heater wrapped
around the outer surface of the tube. If the tube is 10 m long, what is the required heat flux? If fluid enters the tube with a fully
developed velocity profile and a uniform temperature profile, what is the surface temperature at the tube exit? Fluid properties may be
approximated as p = 1000 kg/m?, c, = 4000 J/kg-K, u = 2x 10kg/s-m, k = 0.8 W/m-K, and Pr = 10.
Determine the required heat flux, W/m?.
q = i
W/m?
Determine the surface temperature at the tube exit, in °C.
T, = i
°C
Transcribed Image Text:In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.21 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter. A uniform heat flux is maintained by an electric resistance heater wrapped around the outer surface of the tube. If the tube is 10 m long, what is the required heat flux? If fluid enters the tube with a fully developed velocity profile and a uniform temperature profile, what is the surface temperature at the tube exit? Fluid properties may be approximated as p = 1000 kg/m?, c, = 4000 J/kg-K, u = 2x 10kg/s-m, k = 0.8 W/m-K, and Pr = 10. Determine the required heat flux, W/m?. q = i W/m? Determine the surface temperature at the tube exit, in °C. T, = i °C
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