EML4304C HW2 - EML4304C Be sure to follow the homework...

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EML4304C – Be sure to follow the homework format as shown on the website! Concept questions: 8-12C. How does the wall shear stress τ w vary along the flow direction in the fully developed region in (a) laminar flow and (b) turbulent flow? 8-13C. What fluid property is responsible for the development of the velocity boundary layer? For what kinds of fluids will there be no velocity boundary layer in a pipe? 8-14C. In the fully developed region of flow in a circular pipe, will the velocity profile change in the flow direction? 8-15C. How is the friction factor for flow in a pipe related to the pressure loss? How is the pressure loss related to the pumping power requirement for a given mass flow rate? 8-16C. Someone claims that the shear stress at the center of a circular pipe during fully developed laminar flow is zero. Do you agree with this claim? Explain. 8-17C. Someone claims that in fully developed turbulent flow in a pipe, the shear stress is a maximum at the pipe surface. Do you agree with this claim? Explain. 8-18C. Consider fully developed flow in a circular pipe with negligible entrance effects. If the length of the pipe is doubled, the head loss will (a) double, (b) more than double, (c) less than double, (d) reduce by half, or (e) remain constant. 8-19C.
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This note was uploaded on 02/14/2012 for the course EML 4034c taught by Professor Abbitt during the Spring '12 term at University of Florida.

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EML4304C HW2 - EML4304C Be sure to follow the homework...

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