Dresden 2017 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 62: Complex Fluids and Soft Matter II (joint DY/CPP)

DY 62.2: Talk

Friday, March 24, 2017, 10:00–10:15, HÜL 186

Temporal evolution of free floating smectic bubbles — •Patricia Dähmlow, Torsten Trittel, Christoph Klopp, Kirsten Harth, and Ralf Stannarius — Otto-von-Guericke University Magdeburg, Germany

Freely floating smectic bubbles are investigated under microgravity conditions, which form a minimal surface, like soap bubbles, in equilibrium. A great advantage of freely floating bubbles is the absence of a meniscus, which acts as a reservoir of smectic material when the surface area of the film changes. In this work, the freely floating bubble must rearrange its internal layer structure without such a reservoir. Bubbles are produced by collapsing catenoids, resulting in an elongated shape after the rupture of the catenoids. With time the bubble shows complex oscillations, which includes the invagination of the film and thus, a temporary increase of the surface area until it relaxes to a sphere. Experiments are performed performed with optical highspeed imaging during parabolic flights.