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FMS

Seminar

Instability of stretched and twisted soap films in a cylinder

Cox, S (Abersytwyth)
Wednesday 26 February 2014, 12:05-12:30

Seminar Room 1, Newton Institute

Abstract

Co-author: Sian Jones (Aberystwyth/Paris Sud)

A soap film, or a flexible area-minimizing membrane without bending and torsional stiffness, that is confined in a cylinder is shown to be susceptible to a surface-tension-driven instability when it is stretched or twisted. This leads to its breakdown and places an upper limit on the aspect ratio of such structures. A simple analysis confirms the values for the critical aspect ratio of the stretched film found in both simulations and experiments on soap films, and this threshold decreases with increasing twist of the film.

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