Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 40: Granular Matter

DY 40.1: Vortrag

Mittwoch, 22. März 2017, 16:30–16:45, ZEU 118

Heaping and secondary flows in sheared granular materials — •David Fischer¹, Tamás Börzsönyi², and Ralf Stannarius¹ — ¹Institute of Experimental Physics, Otto von Guericke University, Universitätsplatz 2, D-39106 Magdeburg, Germany — ²Institute for Solid State Physics and Optics, Wigner Research Center for Physics, Hungarian Academy of Sciences, PO Box 49, H-1525 Budapest, Hungary

In granular matter, grain shape may have important consequences on macroscopic physical behaviour. Cylindrical split-bottom containers are well established experimental devices to shear granular materials in a continuous way, and to generate well-defined localized shear bands in the granular bed. In such shear experiments, shape-anisotropic grains develop a "secondary flow" profile in radial direction which leads to the formation of a considerable heap of material in the center of the container. We describe the quantitative influence of geometric and dynamic parameters.