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Figure 5


Fig. 5. DPIV setup. (A) Typical velocity vectors. The black thick line denotes wing section and the solid-dot the leading edge. The white area in front of the wing represents the shadow due to the nontransparency of the aluminum wing. Scale bar, 200 mm s-1. (B) Sketch of DPIV arrangement. The large gray arrow denotes the positioning translation of the model system. X and Z are two axes in the horizontal plane, while Y heads vertically away from the ground; z, the distance between the wing-base and the laser-sheet; r, the effective wing length. The laser-sheet and CCD were always perpendicular and parallel to Z, respectively.





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