Drainage of single Plateau borders: Direct observation of rigid and mobile interfaces

Stephan A. Koehler, Sascha Hilgenfeldt, Eric R. Weeks, Howard A. Stone

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Abstract

Foam drainage varies with surfactant. We present direct measurements of the flow velocity profiles across single Plateau borders, which make up the interconnected channel-like network for liquid flow. For protein foams the interface is rigid, whereas small-surfactant foams show significant interfacial mobility. The results agree with a model that takes into account the shearing of the liquid-gas interface transverse to the flow direction. A significant consequence is that bubble size and liquid volume fraction in a foam affect the relative importance of surface rheology on the drainage behavior.
Original languageEnglish
Article number040601(R)
Number of pages4
JournalPhysical review E: Statistical physics, plasmas, fluids, and related interdisciplinary topics
Volume66
Issue number4
DOIs
Publication statusPublished - 2002

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Keywords

  • IR-44338
  • METIS-208930

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