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Fig. 3. The test of four vortex identification criteria. Data at 0.25T,
when the vortical system was most intricate, were tested. The dimensionless
values of the iso-surfaces (the red regions) of |
|,
, Q and
2 are 0.22, 0.00015, 0.09 and 0.04,
respectively. The values of |
|,
and Q
are normalized by their maxima (>0), whereas the value of
2 is normalized by the minimum (<0). The blue plate is
the model wing.