Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Posters II

DY 29.50: Poster

Donnerstag, 29. März 2012, 17:00–19:00, Poster A

Moving grains out of the way — •Jean-François Métayer¹, Annika Döring¹, Mario Scheel², and Matthias Schröter¹ — ¹Max Planck Institute for Dynamics and Self-organization, Göttingen, Germany — ²European Synchrotron Radiation Facility Beamline ID15, Grenoble, France

A recent study on slowly sheared granular media [1] found that the fluctuations of the shear stress could be used to measure the elastic response of the granular medium.

Continuing this study, we made tomographies of a slowly sheared granular bed at ESRF synchrotron in Grenoble. Using particle tracking we were able to access the length of the shear zone, which is necessary to compute elastic moduli of the granular medium. We also visualized the local reorganisation of grains while the bed is sheared. These quantities are presented as a function of the initial packing fraction (before the bed is sheared) and allow more insight in the measurements shown in [1].

[1] J-F. Métayer, D. Suntrup, C. Radin, H. Swinney, and M. Schröter, EPL 93 (2011) 64003