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DY: Fachverband Dynamik und Statistische Physik

DY 40: Posters II

DY 40.1: Poster

Donnerstag, 17. März 2011, 17:00–19:00, P3

Mobility and motion in a restricted geometry of liquid crystalline membranes — •Sebastian Baumgarten, Alexey Eremin, and Ralf Stannarius — Institut für Experimentelle Physik, Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg

Flow phenomena in restricted geometries have been intensively studied in the last years with implications to different physical, chemical and biological systems. We report straightforward experiments where we observed the motion of inclusions in tilted free-standing films under gravity forces. Translational mobility of solid (silica beads) and liquid (water/glycerin droplets) microscopic inclusions in planar films of the smectic-A phase have been measured. The effects of the confinement (film size), and the role of the viscosity of the outer gas have been investigated. They will be discussed in terms of Saffman-Delbrück and Hughes-Pailthorpe-White (HPW) models.