Berlin 2008 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.56: Poster

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

Mimetic intruders in a two dimensional system of vertically excited granulate — •Jonathan Kollmer, Christof A. Kruelle, and Ingo Rehberg — Universität Bayreuth, 95440 Bayreuth, Germany

An initially close packed granular bed of hard spheres is confined by two glass plates with a separation only slightly larger than the particle diameter. In this experiment one or more intruders are inserted and the container is exposed to sinusoidal oscillations. When a critical value of the forcing strength is reached, the granular bed begins to fluidize[1] and segregation as well as intruder-intruder interaction can be observed. While common experiments[2] to study these effects use large disks as intruders this approach utilizes intruders composed of the same beads as the granulate.
[1] Andreas Götzendorfer, Chi-Hwang Tai, Christof A. Kruelle, Ingo Rehberg and Shu-San Hsiau, Phys. Rev. E 74, 011304 (2006)
[2] D.A. Sanders, M.R. Swift, R.M. Bowley and P.J. King - Europhys. Lett., 73(3), pp. 349-355 (2006)