Dresden 2009 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 28: Pattern formation in colloidal and granular systems II

DY 28.2: Vortrag

Freitag, 27. März 2009, 10:30–10:45, HÜL 386

Granular segregation phenomena in rotating containers — Lama Naji, Tilo Finger, and •Ralf Stannarius — Otto-von-Guericke-Universität Magdeburg

Segregation of granular mixtures in rotating drums and the subsequent coarsening of segregation patterns are well investigated phenomena. But still, many basic questions are poorly understood, among them the mechanism of coarsening of stripe patterns in cylindrical tubes, and the role of lateral boundaries. We investigate slurries, mixtures of glass beads in liquid environment (water). These systems do not only allow the optical observation of surface patterns, but also a three-dimensional structure characterization by NMR tomography. Experiments with cylindrical and spherical mixers are reported.