Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Transcribed Image Text:Assume that the wall shear stress, Tw, created when a fluid flows through a pipe (see Figure a) depends on the pipe diameter, D, the flowrate, Q, the fluid density, p, and the kinematic viscosity, v. Some
model tests run in a laboratory using water in a 0.2-ft-diameter pipe yield the Tw vs. Q data shown in Figure b. Perform a dimensional analysis and use model data to predict the wall shear stress in a 0.3-ft-
diameter pipe through which water flows at the rate of 1.5 ft3/s.
0.7
Diameter = D
0.6
2 0.5
0.4
Model data
(a)
0.3
0.2
0.1
0.5
1.5
Flowrate, Q, ft/s
(b)
Tw
Ib/ft2
Wall shear stress, T,, Ib/ft?
n * m N -
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