Dresden 2017 – wissenschaftliches Programm
CPP 65.2: Vortrag
Freitag, 24. März 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.