Аннотация:Synchronous macrophotography and high-speed video filming data were used to investigate
pinch-off, oscillations and short capillary surface waves of a free falling droplet. Planning
of the experiment was carried out taking into account a free surface energy resulted from
anisotropy of atomic-molecular interactions in a thin subsurface layer with a thickness of
the order of the molecular cluster size (10-6 cm). During a drop pinch-off, fast process of
the free surface energy release leads to formation of large-amplitude oscillations and short
capillary waves. Theoretical model of droplet oscillations based on the Euler equations was
developed.