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Fig. 9. (A) PIV measurements of water velocities relative to the aesthetascs of a
dynamically scaled model of the lateral flagellum of the antennule of a P.
argus during a flick downstroke (from right to left, details described in
Fig. 5). The aesthetascs in
this case point in the same direction as antennule motion, rather than being
oriented 32° from the direction of the oncoming flow relative to the
antennule (see Fig. 2). (B)
Peak velocity along the mid-line of the aesthetasc array (transect shown in
red) and the mean velocity. Mean velocity was computed as the area-averaged
velocity for the 20 transects made through the array. Peak velocity was the
maximum velocity measured at a given distance from the lateral flagellum along
any of the transects.
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