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Fig. 8. Velocity profiles (left) and vorticity profiles (right) in vertical
transects through the LEV after simple freestream subtraction. Three separate
wingbeats at each of the two flight speeds (1.2 m s-1 and 3.5 m
s-1) with the light sheet at the centreline and midwing positions.
In each case the peak in vorticity coincides with the centre of the portion of
the velocity profiles, which are associated with solid body rotation of the
vortex core. Each transect represents the horizontal component of the velocity
vector, i.e. the component parallel with the freestream.
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