T1s in soap film architecture: effect of surfactants and assembly geometry
Seminar Room 1, Newton Institute
AbstractCo-authors: Cantat Isabelle (Institut de Physique de Rennes), Seiwert Jacopo (Institut de Physique de Rennes), Petit Pauline (ILM, CNRS and University Lyon 1)
In this study, we use particular soap film architecture (cubic or parallelepipedic) to study topological rearrangement dynamics and especially the freshly film structure. In the cubic frame architecture, by measuring the thickness profile of the film and the velocity profile within the liquid, we identify two mechanisms of film formation, which are a pure elongation of a liquid meniscus or a film at rest pulled out the Plateau borders. Experiments in a parallelepipedic architecture, much more realistic for 3D foams, have underlined a different mechanism consisting in a Plateau border unzipping mechanism. For certain types of surfactants, this process is associated to oscillations (due to inertia and capillary recoil) and rupture of adjacent films. Moreover, front propagations to redistribute the liquid after the T1 in the soap film assembly have also been observed.
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