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Fig. 5. Velocity magnitude (A,C,E) and vorticity contour plots (B,D,F) during three jets from three different adult L. pealei holding position at three different swimming speeds. (A,B) 13 cm s-1, (C,D) 25 cm s-1, (E,F) 56 cm s-1. Note the decrease in jet angle subtended from the horizontal with increasing swimming speed. The magnitudes of vorticity contours are (B,F) 3, 4, 6, 10, 15 and 20 rad s-1, and (D) 4, 6, 10, 15 and 20 rad s-1. See explanation of contour identification in Fig. 2. (A,B) t=0.5 s, t/{Delta}tj=1.3, (C,D) t=0.3 s, t/{Delta}tj=0.5, and (E,F) t=0.2 s, t/{Delta}tj=1.0.





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