Page 126 - FLUID MECHANICS EBOOK FINAL (2)

FLUID MECHANICS

Example 5.3

Determine the loss of head due to friction in a pipe 14 m long and 2 m diameter which

carries 1.5 m/s oil. Take into consideration f = 0.05.

Solution to Example 5.3

4 fL v 2
h =
f
d 2 g

4 ( 05.0 )( ) 5 . 1 2
14
=  0= . 16 m of oil
2 2 ( 81.9 )

5.3 Pipeline Problems

All pipeline problems should be solved by applying Bernoulli’s theorem between points for

which the total energy is known and including expressions for any loss of energy due to

shock or to friction, thus

p 1 + v 1 2 + z = p 2 + v 2 2 z + loss +
 g 2 g 1  g 2 g 2 shock frictional loss

5.3.1 Discharge to atmosphere

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