Page 96 - ebook fluid mechanics_finalize

FLUID MECHANICS

This equation can therefore be written,

p − p 2 = v 2 2 − v 1 2
1
 2 g

For continuity of flow,

A 1 v = A 2 v
2
1
or

d 
  2  d  2 
 1  v =  2 v 
  1   2
 4   4 

then,

2
2
d  v = d  v
1
1
2
2
So,
 d  2

v 2 = v 1  1 

 d 2 

Putting v = 5 . 4 m s / , d = 10 mm, d = 7 mm
1 1 2

 10  2
v 2 = 5 . 4   9= . 18 m s /
 7 

and

p − p 2 = v 2 2 − v 1 2
1
 2 g

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