Air Entrainment by Contact Lines of a Solid Plate Plunged into a Viscous Fluid

Antonin Marchand, Tak Shing Chan, Jacco H. Snoeijer, Bruno Andreotti

Research output: Contribution to journalArticleAcademicpeer-review

40 Citations (Scopus)
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Abstract

The entrainment of air by advancing contact lines is studied by plunging a solid plate into a very viscous liquid. Above a threshold velocity, we observe the formation of an extended air film, typically 10 microns thick, which subsequently decays into air bubbles. Exploring a large range of viscous liquids, we find an unexpectedly weak dependence of entrainment speed on liquid viscosity, pointing towards a crucial role of the flow inside the air film. This induces a striking asymmetry between wetting and dewetting: while the breakup of the air film strongly resembles the dewetting of a liquid film, the wetting speeds are larger by orders of magnitude.
Original languageEnglish
Article number204501
Number of pages5
JournalPhysical review letters
Volume108
Issue number20
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-288418
  • IR-81795

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