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class24_pipe_flow_part2

# class24_pipe_flow_part2 - of 1.83 m/s The hose has a...

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12/3/2007 1 ES330, Section 2 Dr. Douglas Bohl 239 Camp x6683, [email protected] www.clarkson.edu/~dbohl/es330 Vorticity in a Stirred Tank with Corn Syrup Resulting Mixing Field

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2 Outline Flow in Pipes – Turbulent Flow in Pipes Example – Minor losses – Examples • Objective Be able to apply determine a pressure drop in a pipe system • Announcements – Read sections 8.6 – Final HW#11 posted – Final Tuesday December 11, 3:15- 6:15 pm in the Alumni Gym
3 Reynolds Number in Pipes

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4
5 Moody Chart Calculated ε /D from problem. Use linear range to guess f , calculate V and Re then iterate solution.

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6 Example Water flows through a horizontal pipe with a diameter of 0.1 in. If the average velocity is 2.01 ft/s what is the head loss through a 20ft length of pipe?
7 Example 21.34 m long hose has water at 20°C flowing through it with an average velocity

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Unformatted text preview: of 1.83 m/s. The hose has a diameter of 1.27 cm and a roughness of 0.0274 cm. What is the pressure drop through the hose? 8 9 Example Air at standard conditions flows through a 4mm copper pipe. The pressure drop is measured to be 1.076 kPa through a 10 cm length of pipe. What is the average velocity through the pipe? Take ( ρ =1.23 kg/m 3 , μ =1.79x10-5 Ns/m 2 , ε =0.0015 mm) 10 11 12 13 Minor Losses We’ve seen that you get a pressure drop through a pipe because of friction. These are “major losses” and usually are dominant in long pipes. However, there are also pressure drops associated with other components in a pipe system (bends, area changes, entrances, etc.). These we call “minor losses” and they can be accounted for. 14 15 16 Example 17 18 19 20...
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