Page 111 - ebook fluid mechanics_finalize

FLUID MECHANICS

Considering the U-tube gauge, where pressures are equal at level CC

p +  x = p +  q x
1
2

p 1 − p 2 =  p 1 − p 2 
 x
   


Putting x = 760 mm = . 0 76 m and,

 g = 13 6 . =

 9 . 0 15 1 .

p − p 2 = 76 1 . =
1
 . 0 14 10 . 72 m of oil

C d = . 0 65

d  2
A = = . 0 0497 m
2
1
4
A 1 d 2 ( 25.0 ) 2
m = = 1 = = 15 1 .
A 2 d 2 2 ( 10.0 ) 2

m 2 = . 6 17

. 0 65 . 0 0497
Q actual = (2 . 9 81 10 . 72 )
. 6 17

0= . 00524  14 5 . = . 0 0762 m 3 s /

100