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Holes and cracks in rigid foam films

Published online by Cambridge University Press:  11 June 2015

P. C. Petit
Affiliation:
Institut Lumière Matière, Université de Lyon, UMR 5306 Université Lyon 1-CNRS, 69622 Villeurbanne, France
M. Le Merrer
Affiliation:
Institut Lumière Matière, Université de Lyon, UMR 5306 Université Lyon 1-CNRS, 69622 Villeurbanne, France
A.-L. Biance*
Affiliation:
Institut Lumière Matière, Université de Lyon, UMR 5306 Université Lyon 1-CNRS, 69622 Villeurbanne, France
*
Email address for correspondence: anne-laure.biance@univ-lyon1.fr

Abstract

The classical problem of foam film rupture dynamics has been investigated when the film interfaces exhibit very high rigidity due to the presence of specific surfactants. Two new features are reported. First, a strong deviation from the well-known Taylor–Culick law is observed. Second, crack-like patterns can be visualized in the film; these patterns are shown to appear at a well-defined film shrinkage. The key role of surface-active material on these features is quantitatively investigated, pointing to the importance of surface elasticity to describe these fast dynamical processes and thus providing an alternative tool to characterize surface elasticity in conditions extremely far from equilibrium. The origin of the cracks and their consequences on film rupturing dynamics are also discussed.

Information

Type
Rapids
Copyright
© 2015 Cambridge University Press 

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