y = 8(x) U(x) Outer turbulent 7(x, y) layer T(x, y) - Tturb Overlap layer Tlam Viscous wall layer Tw(x) (a) (b)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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The viscous sublayer (Fig. 6.9) is normally less than
1 percent of the pipe diameter and therefore very difficult to
probe with a finite-sized instrument. In an effort to generate
a thick sublayer for probing, Pennsylvania State University
in 1964 built a pipe with a flow of glycerin. Assume a smooth
12-in-diameter pipe with V = 60 ft/s and glycerin at 20°C.
Compute the sublayer thickness in inches and the pumping
horsepower required at 75 percent efficiency if L = 40 ft.

y = 8(x)
U(x)
Outer
turbulent
7(x, y)
layer
T(x, y) -
Tturb
Overlap layer
Tlam
Viscous wall layer
Tw(x)
(a)
(b)
Transcribed Image Text:y = 8(x) U(x) Outer turbulent 7(x, y) layer T(x, y) - Tturb Overlap layer Tlam Viscous wall layer Tw(x) (a) (b)
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