374670.fig.005a
(a)
374670.fig.005b
(b)
Figure 5: Profiles of the velocity 𝜔 ( 𝑟 , 𝑡 ) and the shear stress 𝜏 ( 𝑟 , 𝑡 ) corresponding to Newtonian, second grade and generalized second grade fluids, 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    𝛽 = 0 . 3 and 𝑡 = 1 0  s.