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FLUID MECHANICS
CHAPTER 5 : ENERGY LOSS IN PIPELINES
5.0 ENERGY LOSS IN PIPELINES
A pipe is defined as a closed conduit of circular section through which the fluid
flows, filling the complete cross-section. The fluid in the pipe has no free surface. It will be
at a pressure which may vary along the pipe. Losses of energy in a pipeline cannot be
ignored. When the shock losses and friction loss have been determined, they are inserted
in Bernoulli’s equation in the usual way.
p 1 v 1 2 p 2 v 2 2
+ + z = + + z + h
1
2
g 2 g g 2 g
5.1 ROUND PIPE SYSTEM
Velocity profile in circular pipe system (refer Figure 5.1)
smooth pipe wall
rough pipe wall
Figure 5.1 : Velocity profile in circular pipe
system
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