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Fig. 2. Flow field from behind an eel. (A) Digital particle image velocimetry
(DPIV) measurement (reproduced with permission from
Tytell, 2007). (B) Simulation
using the vortex sheet method. The key feature of the wake claimed by Tytell
and Lauder (Tytell and Lauder,
2004), i.e. the strong lateral jet rather than a downstream jet,
is consistent between the simulation and the measurement.