Dresden 2011 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 40: Posters II
DY 40.20: Poster
Thursday, March 17, 2011, 17:00–19:00, P3
Geometrical structure of spheres around Random Close Packing — •Frank Rietz1,2, Charles Radin3, Harry L. Swinney3, and Matthias Schroeter2 — 1Univ. of Magdeburg — 2MPI Dynamics & Self-Organization Goettingen — 3Univ. of Texas at Austin
The name Random Close Packing refers to the experimental observation that some ways of packing of monodisperse beads (like vertical vibration or sedimentation) can’t exceed a volume fraction of ≈64%. There are several competing theories trying to explain this phenomenon and it is still unclear how to correctly define the Random Close Packing density. The three-dimensional distribution of particles below and above Random Close Packing is investigated. We match the index of the surrounding liquid to provide access to the interior of the granular bed. We measured local packing densities and order parameter by means of Voronoi cells. This allows us to comment on the question if Random Close Packing is well defined.