Page 242 - Dust Explosions in the Process Industries

2 7 4 Dust Explosions in the Process Industries

-
ln
\
E
-
I
e
.-
u
+ L
n
m
z
.-
L
e 10-1
.I=
n
G
0
)r
-
c
"
0
W > lo-*
.- -
m
c
+
c
-
e
UI
m
.-
c
I-
10-4
1 , , , , , .A Figure 3.10 Terminal settling velocities for spheri-
lo-; , , , , , , ,,[ , , , ,,,.,I
1 10 lo2 103 cal particles of various diameters and densities at
atmospheric pressure and 20°C (from Perry and
Diameter of spherical Particle [pml Chilton, 1973).

Figure 3.1 1 Optical micrograph of a metal shad-
owed sample of lycopodium. The shadowing angle
is 20".