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FLUID MECHANICS

Example 5.6

Two reservoirs are connected by a pipeline which is 150 mm in diameter for the first 6 m

and 225 mm in diameter for the remaining 15 m (Figure 5.8). The entrance and exit are
sharp and the change of section is sudden. The water surface in the upper reservoir is 6 m

above that in the lower. Tabulate the losses of head which occur and calculate the rate of

3
flow in m /s. Friction coefficient f is 0.01 for both pipes.

Solution to Example 5.6

Since d1 = 150 mm and d2 = 225 mm

v =  225  2 v =  9  v 



1
 150  2  4  2

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