374670.fig.004a
(a)
374670.fig.004b
(b)
Figure 4: 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 , 𝜈 = 0 . 0 0 0 2 5 9 , 𝜇 = 0 . 2 4 6 , 𝛼 = 0 . 0 0 1 5 3 and different values of 𝛽 .