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Fig. 6. Flow visualization and streamline plots of rotational fling at five points in time. The wing motion used in each case is shown in Fig. 5A. (A) Flow visualization of fling captured by Spedding and Maxworthy (1986) at a Reynolds number (Re) ~3 x103. (B) Streamline plots of fling calculated numerically for two rigid elliptic wings by Sun and Yu (2003) at Re ~3 x103. (C) Streamline plots of fling calculated from immersed boundary simulations at Re ~128. In all cases, two large leading vortices form and appear to remain attached to each wing during rotation.





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