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Figure 13


Fig. 13. The iso-surfaces of q cut with (A) x1–x3 and (B) x2–x3 mid-planes showing the footprints of the wake structure using the out-of-plane vorticity contours. The inset (C) gives a closer look at the structures cut with both x1–x3 and x2–x3 mid-planes (Re=4000, St=0.7).