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DY: Fachverband Dynamik und Statistische Physik
DY 29: Poster II
DY 29.54: Poster
Thursday, February 28, 2008, 16:00–18:00, Poster C
Granular Robots — •Z. S. Khan1, A. Steinberger1, M. Scheel1, R. Seemann1,2, and S. Herminghaus1 — 1MPI for Dynamics and Self-Organization, Bunsenstr. 10, D-37073 Goettingen — 2Experimental Physics, Saarland University, D-66041 Saarbruecken
We have recently observed that when a bidisperse mixture of glass beads is moistened by a fluid and shaken sinusoidally in a vertical container, small agglomerates of beads held together against the wall by liquid capillary bridges take off from the surface of the pile and rapidly climb up the container walls against gravity. These self-organized agglomerates have one large grain at the head of the structure with one or more small grains trailing behind. When similar agglomerates are placed on a horizontally vibrating substrate they travel horizontally along the axis of vibration. We report our investigations of this novel system, including the agglomerate speed as a function of the applied acceleration, viscosity of the wetting fluid and agglomerate structure.