Dresden 2009 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 12: Poster I

DY 12.3: Poster

Dienstag, 24. März 2009, 14:30–16:30, P1A

Fluidization and segregation in a vertically vibrated quasi two-dimensional granulate — •Jonathan Kollmer1, Christof A. Krülle1,2, and Ingo Rehberg11Experimentalphysik V, Universität Bayreuth, 95447 Bayreuth, Germany — 2Maschinenbau und Mechatronik, Hochschule Karlsruhe - Technik und Wirtschaft, 76133 Karlsruhe, Germany

An ensemble of hard spheres confined by two vertical glass plates forming a gap only slightly larger than the particle diameter - comparable to a Hele-Shaw cell - is vertically oscillated. To study segregation intruders are designed by gluing several spheres together. When a critical value of the forcing strength is reached, the granular bed begins to fluidize and - in the presence of intruders - segregation phenomena can be observed. By tracking of all granular particles, density and velocity fields of the system are measured. The question whether the intruders attract each other or are driven to a common location is addressed.

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