Liquid flow through aqueous foams: The node-dominated foam drainage equation

Stephan A. Koehler, Sascha Hilgenfeldt, Howard A. Stone

Research output: Contribution to journalArticle

Abstract

We present an experimental study of forced drainage through a soap foam, where a constant liquid flux at the top of a dry foam produces a downwards traveling wave with a constant velocity and uniform liquid content. The results are not consistent with existing models and we propose a new model, based upon relaxing the condition of wall rigidity throughout the network and emphasizing the importance of viscous damping in the nodes where Plateau borders meet. This model agrees well with the experimentally measured (power-law) scaling behavior of the drainage velocity, and the width of the propagating liquid front, on the imposed flow rate and bubble size.

Original languageEnglish (US)
Pages (from-to)4232-4235
Number of pages4
JournalPhysical review letters
Volume82
Issue number21
DOIs
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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