Viscous to inertial crossover in liquid drop coalescence

Joseph D. Paulsen, Justin C. Burton, Sidney R. Nagel

Research output: Contribution to journalArticle

105 Scopus citations

Abstract

Using an electrical method and high-speed imaging, we probe drop coalescence down to 10 ns after the drops touch. By varying the liquid viscosity over two decades, we conclude that, at a sufficiently low approach velocity where deformation is not present, the drops coalesce with an unexpectedly late crossover time between a regime dominated by viscous and one dominated by inertial effects. We argue that the late crossover, not accounted for in the theory, can be explained by an appropriate choice of length scales present in the flow geometry.

Original languageEnglish (US)
Article number114501
JournalPhysical Review Letters
Volume106
Issue number11
DOIs
StatePublished - Mar 14 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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