Speed of fragments ejected by an expanding liquid tin sheet

Abstract

We experimentally investigate the speed of fragments produced by ligament breakup in laser-induced deformation of tin microdroplets into axisymmetric sheets. A double-frame backlit camera is used to obtain the speed of the fragments and the time of their detachment. We show that by normalizing these speeds to the initial expansion speed of the sheet, all data collapse onto a single universal curve that is a function of the dimensionless time ${t}_{d}/{\ensuremath{\tau}}_{c}$ only, where ${\ensuremath{\tau}}_{c}$ is the capillary time. We further find that this universal curve is explicitly independent of the droplet's Weber number.

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