Effect of Surface Tension Variations on the Pinch-Off Behavior of Small Fluid Drops in the Presence of Surfactants

M. Roché, M. Aytouna, D. Bonn, and H. Kellay
Phys. Rev. Lett. 103, 264501 – Published 22 December 2009

Abstract

It is shown experimentally that surfactants can change the thinning rate of fluid necks undergoing rupture. In the case of two-fluid pinch-off, two or three linear regimes are observed for the variation of the neck radius versus time. The surface tension in the neck region changes with time, as a result of surfactant depletion. Similar results are obtained for the case of a single fluid pinching in air. The depletion of surfactant can be either partial or complete depending on the rate of transport of the surfactant from the bulk to the surface.

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  • Received 15 April 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.264501

©2009 American Physical Society

Authors & Affiliations

M. Roché1, M. Aytouna2, D. Bonn2,3, and H. Kellay1

  • 1Université Bordeaux 1, Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798 CNRS, 351 cours de la Libération, 33405 Talence, France
  • 2WZI, University of Amsterdam, 1018XE Amsterdam, The Netherlands
  • 3LPS, ENS, 24 rue Lhomond, 75231 Paris, France

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Vol. 103, Iss. 26 — 31 December 2009

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