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Problem 4.28
[Difficulty: 1]
Given:
Data on filling of a sink
Find:
Time to half fill; rate at which level drops
Solution:
This is an unsteady problem if we choose the CS as the entire sink
Basic equation
t
M
CV
∂
∂
CS
ρ
V
→
⋅
A
→
⋅
()
∑
+
0
=
Assumptions:
1) Incompressible flow
Given data:
m
rate
4 gpm
⋅
=
L2
f
t
⋅
=
w1
8
i
n
⋅
=
d1
2
i
n
⋅
=
Q
4 gpm
⋅
=
Q
drain
1 gpm
⋅
=
Hence
t
M
CV
∂
∂
CS
ρ
V
→
⋅
A
→
⋅
()
∑
−
=
Inflow
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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

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