This preview shows page 1. Sign up to view the full content.
Problem 3.30
[Difficulty: 2]
Given:
Reservoir manometer with dimensions shown.
The manometer fluid
specific gravity is given.
D
5
8
in
⋅
=
d
3
16
in
⋅
=
SG
oil
0.827
=
Find:
The required distance between vertical marks on the scale
corresponding to
Δ
p of 1 in water.
Solution:
We will apply the hydrostatics equations to this system.
Governing Equations:
dp
dz
ρ
−
g
⋅
=
(Hydrostatic Pressure  z is positive upwards)
ρ
SG
ρ
water
⋅
=
(Definition of Specific Gravity)
Assumptions:
(1) Static liquid
(2) Incompressible liquid
h
x
Integrating the hydrostatic pressure equation we get:
Δ
p
ρ
−
g
⋅
Δ
z
⋅
=
Beginning at the free surface of the tank, and accounting for the changes in pressure with
elevation:
p
atm
Δ
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 10/19/2011 for the course EGN 3353C taught by Professor Lear during the Fall '07 term at University of Florida.
 Fall '07
 Lear
 Fluid Mechanics

Click to edit the document details