Seminar on : History and Structure of Granular Sediments
To be delivered by : Prof. Thorsten Poeschel — Institute for Multiscale Simulation
About the speaker
Prof. Thorsten Poeschel is a faculty at LS Multiscale Simulation of Particulate Systems, Technische Fakultät, Department Chemical and Biological Engineering. His research interests include simulations in granular matter, fluid mechanics and statistical mechanics. He has received Ph.D. in electronics from Dresden University of Technology and Ph.D. in theoretical physics from Humboldt-Universität zu Berlin. He is an editor of several reputed journals including Granular Matter, Computational Particle Mechanics, Revista Cubana de Física and Nature-Scientific Reports. He has been awarded Adolf-Ferdinand-Weinhold-Award at Technische Universität Chemnitz. He has 146 peer-reviewed publications (Web of Science) with ~2600 accumulated citations and h-Index of 27.
Abstract
We consider the sedimentation of monodisperse granular particles under the infuence of gravity. The history of the process is described by the surface of the sediment as a function of time. We show that the resulting structure of the sediment, characterized by the field of contact number is intimately related to the process of sedimentation such that the history of the process, can be completely deduced from the time-independent field of contact number of the sediment. We show that the structural features of a sediment arising from the specific process of sedimentation may be quantified by Minkowski tensors.
Ref:
N. Topic, F. Schaller, G. Schröder-Turk, T. Pöschel: "The microscopic structure of mono-disperse granular heaps and sediments of particles on inclined surfaces” Soft Matter Vol. 12, 3184 (2016)
N. Topic, J. Gallas, T. Pöschel: "Nonuniformities in the angle of repose and packing fraction of large heaps of particles" Physical Review Letters Vol. 109, 128001 (2012)