Oscillation and pinchoff of axisymmetric droplets

Abstract eng:
Oscillation and pinchoff of axisymmetric droplets are studied numerically using the model of axisymmetric vortex sheets with surface tension in inviscid fluids. Droplets are initially at rest and biconcave, and then evolve under the action of surface tension. Oscillation of a droplet is observed for a sufficiently small depth of the initial dent. For a large value of this depth that causes the high curvature of a vortex sheet, however, it pinches off at two points and breaks into two end-droplets and a satellite droplet. We observe that a significantly small satellite droplet is generated for the smallest depth of the initial dent within the region where pinchoff occurs.

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