Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
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Textbook Question
Chapter 11, Problem 20P
At what depths can 800 cfs flow in a trapezoidal channel of base width 12 ft and side slopes 1 (vert.) on 3 (horiz.) if the specific energy is 7 ft?
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If the channel (Consider a rectangular channel 3 m wide laid on a 1°slope. If the water depth is 2 m, the hydraulic radius is) is built of rubble cement(Manning’s n ≈ 0.020), what is the uniform fl ow ratewhen the water depth is 2 m?(a) 6 m3/s, (b) 18 m3/s, (c) 36 m3/s, (d ) 40 m3/s,(e) 53 m3/s
2. A flow of water of 100 litres per second flows
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Also find the conveyance K of the flume.
:3.9 m's
Ans.
1524
In flood stage a natural channel often consists of a deepmain channel plus two floodplains, as in Fig. Thefloodplains are often shallow and rough. If the channel hasthe same slope everywhere, how would you analyze thissituation for the discharge? Suppose that y1 = 20 ft, y2 =5 ft, b1 = 40 ft, b2 = 100 ft, n1 = 0.020, and n2 = 0.040,with a slope of 0.0002. Estimate the discharge in ft3/s.
Chapter 11 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
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