HW3_ENFP300_2012 - ENFP 300 Due date(Quiz 2 HW#3 Please...

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ENFP 300 Due date: 02/23/2012 (Quiz 2) HW #3 Please remember to use the FIND, GIVEN, SKETCH, ASSUMPTIONS, ANALYSIS, DISCUSSION approach. Fluid properties can be found in Appendix B. Interpolation of table values may be required. Problems 1. Air at 366.5 K flows at standard atmospheric pressure in a pipe at a rate of 0.0363 kg/s. Determine the minimum diameter allowed for this flow to be laminar. Answer: 1.024 m 2. CO 2 at 20 Celsius and 550 kPa flows in a pipe at a rate of 4.07 x 10 -3 kg/s. What is the maximum diameter allowed if the flow is to be turbulent? Answer: 0.0883 m 3. Oil (SG = 0.9), kinematic viscosity = 6.5x10 -4 m 2 /s flows in a pipe with diameter = 7.62 cm at a flowrate of 2.835x10 -4 m 3 /s. Use a Moody chart to obtain the friction factor and estimate the head loss per unit length. Answer: 3.2029 meters / meter . Figure for Problem 4
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4. As you can see in the figure, the velocity profile for fully developed laminar flow is parabolic, while for turbulent flow at Re = 10000, it can be approximated by the power law shown.
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