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DY: Fachverband Dynamik und Statistische Physik

DY 33: Nonlinear dynamics and pattern formation

DY 33.3: Vortrag

Freitag, 30. März 2007, 12:30–12:45, H3

Localized Subharmonic Waves in a Circularly Vibrated Granular Bed — •Andreas Götzendorfer¹, Daniel Svenšek², Christof Kruelle¹, and Ingo Rehberg¹ — ¹Experimentalphysik V, Universität Bayreuth — ²Department of Physics, University of Ljubljana, Slovenia

Localized period doubling waves arise in circularly shaken granular beds contained in an annular channel. These solitary wave packets are accompanied by a locally increased particle density. The width and velocity of the granular wave pulse are measured as a function of the amount of material in the container. A continuum model for the material distribution, based on the measured granular transport velocity as a function of the bed thickness, captures the essence of the experimental findings.