Mechanism for flow-rate controlled breakup in confined geometries: A route to monodisperse emulsions

Piotr Garstecki, Howard A. Stone, George M. Whitesides

Research output: Contribution to journalArticlepeer-review

441 Scopus citations

Abstract

This Letter describes a quasistationary breakup of an immiscible, inviscid fluid at low capillary numbers. The breakup proceeds in a coflowing, viscous liquid, in a confined geometry of a long and narrow orifice. In contrast to the capillary instability in an unbounded fluid, the collapse proceeds through a series of equilibria, each yielding the minimum interfacial energy of the fluid-fluid interface. The process is slow in comparison to typical relaxation speeds of the interface, and it is reversible. Its quasistatic character of collapse forms the basis for controlled, high-throughput generation of monodisperse fluid dispersions.

Original languageEnglish (US)
Article number164501
JournalPhysical review letters
Volume94
Issue number16
DOIs
StatePublished - Apr 29 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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