e filter bed m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:% of sand retained Geometric mean sand
on sieve, x10?
Sieve
number
size ft x 10-3
Solved
14-20
20-28
28-32
1.10
6.60
15.94
3.28 R,F
2.29
1.77
1.51
problem
32-35
35-42
42-48
48-60
60-65
65-100
18.60
19.10
17.60
A sand consisting of the following
sizes are used as shown in the
table. The filter bed measures
20 20 ft? and is 2 ft deep. The
sands has a porosity of 0.4 and a
shape factor of 0.95. The filtration
rate is 4 gal/min. ft?. Assume the
viscosity is 3*5 105 Ib-s/ft2. find
the head loss through the clean
sand.
1.25
1.05
14.30
5.10
1.66
0.88
0.75
0.59
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