Page 119 - ebook fluid mechanics_finalize

FLUID MECHANICS

Example 5.1

A pipe carrying 1800 l/min of water increases suddenly from 10 cm to 15 cm diameter.

Find

a) the head loss due to the sudden enlargement

2
b) the difference in pressure in kN/m in the two pipes

Solution to Example 5.1

a) 1 liter = 0.001 m 3

1800 l = 1.8 m 3

QA = AA vA = AB vB

So that

vA =Q/AA

3= . 8917 m s /

vB =Q/AB

. 0 03
= ) 2 1= . 697 m s /
 ( 15.0
4

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