(a)
(b)
Figure 2:
Profiles of the velocity
𝑤
(
𝑟
,
𝑡
)
and shear stress
𝜏
(
𝑟
,
𝑡
)
given by (
3.16
) and (
3.24
) for
𝑅
1
=
0
.
3
,
𝑅
2
=
0
.
5
,
Ω
1
=
1
,
Ω
2
=
1
,
𝜈
=
0
.
0
0
4
,
𝜇
=
2
.
9
1
6
,
𝜆
=
4
,
𝛽
=
0
.
5
, and different values of
𝑡
.