Droplet formation from the breakup of micron-sized liquid jets

ORAL

Abstract

Droplet formation from the breakup of a liquid jet emerging from a micron-sized circular nozzle is investigated with ultra high-speed imaging at 1 million frames per second and within a lubrication approximation model [Eggers and Dupont, Phys. Rev. Lett. 262, 1994, 205-221]. The capillary time $\tau_c = \sqrt {\rho r^3 / \gamma}$ is extremely small -- of the order of $1\mu {}\mbox{s}$. In the analyzed low Reynolds number regime the jet breakup is driven by surface tension forces only. Rayleigh breakup is not influenced by the surrounding air. The high- speed imaging results and those from the model calculation perfectly agree for various liquid viscosities and jet velocities, confirming a universal scaling law also for diminutive Rayleigh jets.

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Authors

  • Wim van Hoeve

    • Physics of Fluids, University of Twente, The Netherlands

  • Arjan van der Bos

    • Physics of Fluids, University of Twente, The Netherlands

  • Michel Versluis

    • Physics of Fluids, University of Twente, The Netherlands

  • Jacco Snoeijer

    • Physics of Fluids, University of Twente, The Netherlands

  • Michael P. Brenner

    • School of Engineering and Applied Sciences, Harvard University, Cambridge, USA

  • Detlef Lohse

    • Physics of Fluids, University of Twente, The Netherlands