Reservoirs A, B, and C are connected as shown in Figure 2.28. The water elevations in reservoirs A, B, and C are 100 m, 80 m, and 60 m, respectively. The three pipes connecting the reservoirs meet at the junction J, with pipe AJ being 900 m long, BJ 800 m long, CJ 700 m long, and the diameter of all pipes equal to 850 mm. If all pipes are made of ductile iron and the water temperature is 20°C, find the flow into or out of each reservoir. Elev. 100 m A LAJ = 900 m Elev. 80 m B LBj= 800 m Elev. 60 m J LJc = 700 m FIGURE 2.28: Connected reservoirs

Reservoirs A, B, and C are connected as shown in Figure 2.28. The water elevations in reservoirs A, B, and C are 100 m, 80 m, and 60 m, respectively. The three pipes connecting the reservoirs meet at the junction J, with pipe AJ being 900 m long, BJ 800 m long, CJ 700 m long, and the diameter of all pipes equal to 850 mm. If all pipes are made of ductile iron and the water temperature is 20°C, find the flow into or out of each reservoir. Elev. 100 m A LAJ = 900 m Elev. 80 m B LBj= 800 m Elev. 60 m J LJc = 700 m FIGURE 2.28: Connected reservoirs

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

1. 2.38
Hint 1: You can assume fully turbulent flow to make
finding f easier
Hing 2:
approach to start by assuming flow direction, create &
solve a system of energy equations between the upper and
lower reservoirs (rather than reservoir to junction) and
applying continuity at the junction.
An alternative

2.38. Reservoirs A, B, and C are connected as shown in
Figure 2.28. The water elevations in reservoirs A, B, and
C are 100 m, 80 m, and 60 m, respectively. The three
pipes connecting the reservoirs meet at the junction J,
with pipe AJ being 900 m long, BJ 800 m long, CJ 700 m
long, and the diameter of all pipes equal to 850 mm.
If all pipes are made of ductile iron and the water
temperature is 20°C, find the flow into or out of each
reservoir.
Elev.
100 m
Elev.
80 m
A
LAJ = 900 m
LBJ = 800 m
Elev.
60 m
Ljc = 700 m
FIGURE 2.28: Connected reservoirs

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