Figure 5

(a) Streamlines at 0.2 s, (b) streamlines at 0.4 s, (c) streamlines at 0.8 s, (d) streamlines at 1.2 s, (e) streamlines at 1.6 s, (f) streamlines at 2.0 s.

(a) Streamlines at 0.2 s, (b) streamlines at 0.4 s, (c) streamlines at 0.8 s, (d) streamlines at 1.2 s, (e) streamlines at 1.6 s, (f) streamlines at 2.0 s.