Figure 9: X-ray images of jetting phenomenon in drop impact. | Nature Communications

Figure 9: X-ray images of jetting phenomenon in drop impact.

From: Origin and dynamics of vortex rings in drop splashing

Figure 9

Here water–ethanol (4:6 in mass fraction) drops are used. (a) Impact at H=35 mm (U=0.83 m s−1) with We=50 and Re=724. Only a lamella is formed, and the vortex ring is generated within the lamella. (b) Impact at H=150 mm (U=1.71 m s−1) with We=214 and Re=1,498. An ejecta is merged with the lamella, suppressing the formation of a vortex ring. (c) Impact at H=250 mm (U=2.21 m s−1) with We=356 and Re=1,934. The drop diameter is 2.3 mm. An ejecta and a lamella separately emerge, and the vortex ring is formed within the lamella. Scale bar, 300 μm long.

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