Transition from symmetric to asymmetric scaling function before drop pinch-off.
The drop pinch-off at a nozzle is studied experimentally for a glycerin-water mixture in surrounding air. The neck diameter of the fluid shrinks with constant velocity. After a distinct transition point, the shrink velocity switches to a smaller value. Before that transition point, the shape of the neck can well be described by a symmetric scaling function, as obtained from Stokes-flow theory of drop formation. This function gives way to an asymmetric scaling function in the final stage before pinch-off.
Rothert
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Physikalisches Institut, Experimentalphysik V, Universität Bayreuth, D-95440 Bayreuth, Germany.
Richter
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Rehberg
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