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Fig. 3. Vector diagram of the flow around a swimming frog in two perpendicular
views. Each vector shows the direction and relative magnitude of the velocity
of the local flow. Maximal velocity is colour coded red, minimal velocity
(around zero) is shown in blue. The top sequence results from a DPIV analysis
of a sequence with a horizontal laser sheet orientation, the bottom sequence
with a vertical laser sheet orientation. From each sequence, six images
distributed equally over the whole kick are shown.