Berlin 2008 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.51: Poster

Thursday, February 28, 2008, 16:00–18:00, Poster C

Granular Dynamics Of Nonspherical Particles — •Wilhelm August, Ingo Rehberg, and Christof Krülle — Experimentalphysik V, Universität Bayreuth, 95440 Bayreuht

In our experiment we shake a monolayer of rice with an industrial conveyor which has been slightly altered. The vibration form possesses besides the vertical a horizontal azimuthal component which leads to a collective transport of the monolayer. We are able to focus on some tracers. Their velocity and orientation has been monitored for a long time interval. This method is an important tool for observing interesting dynamic phenomena [1]. We also measured the decay of the rotational diffusion constant over some decades [2]. Moreover, this setup allows to observe some other phenomena typical for granular matter, like e.g. segregation or heaping.

[1] Igor S. Aranson, Dmitri Volfson, and Lev Tsimring, Phys. Rev. E 75, 051301 (2007)

[2] P. Dhar, Th. M. Fischer, Y. Wang, T. E. Mallouk, W. F. Paxton, and A. Sen, Nano Letters 6, 66-72 (2006)