374670.fig.002a
(a)
374670.fig.002b
(b)
Figure 2: Profiles of the velocity 𝜔 ( 𝑟 , 𝑡 ) and the shear stress 𝜏 ( 𝑟 , 𝑡 ) given by (3.15) and (3.22), for 𝑓 = 1 , 𝑅 1 = 0 . 3 , 𝑅 2 = 0 . 5 , 𝛼 = 0 . 0 0 1 5 3 , 𝛽 = 0 . 3    𝑡 = 1 0  s and different values of 𝜈 .