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DY: Fachverband Dynamik und Statistische Physik
DY 50: Granular Matter and Granular Dynamics II
DY 50.4: Vortrag
Donnerstag, 19. März 2020, 10:45–11:00, ZEU 160
Configuration statistics of sphere packings in geometrical confinement — •David Fischer1, Jonas Schulze1, Ralf Stannarius1, Sára Lévay2, Tamás Börzsönyi3, and János Török2 — 1Otto von Guericke University Magdeburg, Germany — 2Budapest University of Technology and Economics, Hungary — 3Wigner Research Centre for Physics, Budapest, Hungary
While regular packings of spheres in 2 and 3 dimensions are satisfactorily understood today, random packings still bear unsolved mysteries. Granular materials are athermal, thus temperature and free energies are not appropriate parameters to describe the statistics of local configurations. Edwards introduced a different concept with local volumes of configurations replacing energies and compactivity replacing temperature. We apply this concept to a 2+epsilon dimensional spatially restricted system, a cuboid cell filled with monodisperse spheres slightly smaller than the cell thickness. Experiments and numerical simulations are compared.