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Soap Film

Videos for our paper Instabilities and Solitons in Minimal Strips, Thomas Machon, Gareth P. Alexander, Raymond E. Goldstein, and Adriana I. Pesci.

Video 1

The first video shows motion of the soliton on a circular frame with diameter 9.4cm, height 3.4cm and q=15, corresponding to \rho\approx 1.7. The frame is controlled manually at two points causing the soliton to move in a counter-clockwise direction from the upper left part of the frame to the lower right, converting a region of wide ribbon into one of narrow ribbon. It stops moving when it has fully converted the ribbon. Video shot using a Phantom V641 high speed camera with a Zeiss Makro-Planar 50mm f/2.0 lens at 300 fps.

Video 2

The second video shows motion of the soliton on a straight portion of a 'hippodrome' frame in the shape of an athletics stadium. The frame is controlled manually at two points at the edge of the field of view, allowing defects to be created in the straight region and moved through it by gentle deformation. The total frame dimensions are 15.76\times 7.23 \times 1.54cm with a helical radius of 0.75cm, giving \rho \approx 3.1 and q=41. Video shot at 240 fps with an iPhone 6 camera.