Page 45 - ebook fluid mechanics_finalize

FLUID MECHANICS

Let, h1 = Height of the light liquid in the left-hand limb above the common surface

in cm.

h2 = Height of the heavy liquid in the right-hand limb above the common

surface in cm.

p = Pressure in the pipe, expressed in terms of head of water in cm
A

ωw = Specific weight of the light liquid

ωhg= Specific gravity of the heavy liquid.

The pressure in the left-hand limb and the right-hand limb above the datum line is equal.

Pressure in the left-hand limb above the datum line

p
Pressure p at B = Pressure C at C
B

p = Pressure, p at A + Pressure due to depth, h of fluid (Water)
1
A
B
= p A +  h 1
w

p +  gh
= A w 1

Thus pressure in the right-hand limb above the datum line

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