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The pressure distribution measured along a straight, horizontal portion of a 50-mm-diameter pipe attached to a tank is shown below. Approximately (a)how long is the entrance length? In the fully developed portion of the flow, (b)what is the value of the wall shear stress?

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Coleen Amado
Coleen AmadoLv10
27 Dec 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Hi there, I was wondering if you could help me with the followingquestions.

1. Will a fluid reach equilibrium when subjected to a steady statestress?
2. Does the distribution of shear stress for lamina flow, varyparabolically with the radius of the pipe?
3. Is the Reynolds number a measure of the ratios of the inertialforces to the viscous forces?
4. If the width is D and breath is 3D, is the hydraulic diameter ofthe full rectangular pipe 2D?
5. Is a friction factor a dimensionless wall shear stress?
6. For laminar flow in a horizontal pipe, under a constant pressuregradient, doe the doubling of the diameter result in a doubling ofthe flow rate?
7. For a rough pipe, does the friction factor keep on decreasingwhen the Reynolds number increases?
8. For a given volumetric flow rate, Q, is the pressure drop inturbulent flow approx. proportional to 1/(D^5) where D= diameter,?

Thanks,
Rebecca

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