Abstract: | The article is concerned with the study of the effect of E. S. Asmolov's corrections to Saffman's lift force for the wall vicinity and a nonzero ratio of Reynolds numbers. It is shown in what way these corrections change the particle paths in a Couette layer and the conditions of deposition.Notation
x=X/D, y=Y/D
dimensionless longitudinal and transverse coordinates
-
u=U
p
/U
, =V
p
/U
dimensionless projections of particle velocity on the longitudinal and transverse axes
- =tU
/D
dimensionless time
-
U
![par](/content/u6420tv512482524/xxlarge8741.gif) 2/(18![ngr](/content/u6420tv512482524/xxlarge957.gif) D)
Stokes number
- =
g
/
p
,
coefficient of the gas kinematic viscosity
-
particle diameter
-
/D
-
g
,
p
densities of the gas and particle material
-
du/d
-
dv/d
-
P
s
Saffman's force
-
C
coefficient in the formula for Saffman's force
-
yRe
d
1/2
-
A
v
r
Re
d
1/2
- ![agr](/content/u6420tv512482524/xxlarge945.gif)
3.08
- Re
V
r
/
- Re
k
2/ ) U
g
/ Y
-
A
Re /Re
k
1/2
- Re
d
U
D/
-
V
r
((U
g
–U
p
)2+V
p
2
)1/2
Indices
g
refers to gas parameters
-
p
refers to the parameters of particles
- 0
at the time momentt=0
-
S
Saffman's force
-
k
Reynolds number based on the velocity gradient
-
based on velocity
-
r
relative velocity
-
x
projection on thex axis |