Granular Packing
Granular Packing
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In this project we develop efficient algorithms for the numerical simulation of large packings of granular materials. Large heaps of granular systems and packings deposited onto a solid surface appear in many scenarios in engineering and science. We investigate such systems by means of numerical simulations using the ballistic deposition algorithm, which allows us to produce packings of millions of particles in a few minutes of computing time. By extending this algorithm in order to account for complex particle shapes, we study the dynamics of agglomerates of nanoparticles. Our simulations reveal that nanopowders develop a robust fractal substructure after repeated fragmentation and reagglomeration.
Publications
| Nikola Topic, Thorsten Pöschel Steepest descent ballistic deposition of complex shaped particles Journal of Computational Physics 308, 421-437(2016) |
| Nikola Topic, Alexander Weuster, Thorsten Pöschel, Dietrich E. Wolf Structure of a three-dimensional nano-powder subjected to repeated fragmentation and sedimentation New Journal of Physics 17, 013024(2014) |
| Eric Josef Ribeiro Parteli, Jochen Schmidt, Christina Blümel, Karl-Ernst Wirth, Wolfgang Peukert, Thorsten Pöschel Attractive particle interaction forces and packing density of fine glass powders Scientific Reports 4, 6227(2014) |
| Nikola Topic, Jason Gallas, Thorsten Pöschel Characteristics of large three-dimensional heaps of particles produced by ballistic deposition from extended sources Philosophical Magazine 93, 4090-4107(2013) |
| Fabian Zimber, Jonathan Kollmer, Thorsten Pöschel Polydirectional Stability of Granular Matter Physical Review Letters 111, 168003(2013) |
| Thorsten Pöschel, Jason Gallas, Nikola Topic Structure of granular packings Proceedings XXIII ICTAM, 19th – 24th August 2012, Beijing, China(2012) |
| Nikola Topic, Jason Gallas, Thorsten Pöschel Nonuniformities in the angle of repose and packing fraction of large heaps of particles Physical Review Letters 109, 128001(2012) |
| Micha-Klaus Müller, Stefan Luding, Thorsten Pöschel Force Statistics and Correlations in Dense Granular Packings Chemical Physics 375, 600-605(2010) |
| Dietrich E. Wolf, Thorsten Pöschel, Thomas Schwager, Alexander Weuster, Lothar Brendel Fractal Substructures due to Fragmentation and Reagglomeration AIP Conference Proceedings 1145, 859-862(2009) |
| Thomas Schwager, E. Wolf Dietrich, Thorsten Pöschel Fractal Substructure of a Nanopowder Physical Review Letters 100, 218002(2008) |
| Gerd Gudehus, Hans Hermann, Kolumban Hutter, Thorsten Pöschel, Jörg Schwedes Mechanik körniger Medien Perspektiven der Forschung und ihrer Förderung, 417-427. Weinheim: Wiley-VCH.(2002) |
| Volkhard Buchholtz, Thorsten Pöschel Numerical investigation of the evolution of sandpiles Physica A, 202, 390-401(1994) |
Posters
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Relation of structure and history of granular sediments Nikola Topic, Thorsten Pöschel |
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Attractive particle interaction forces and packing density of fine glass powders (Poster) Eric Parteli, J. Schmidt, C. Blümel, K. E. Wirth, W. Peukert, Thorsten Pöschel |
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Modeling the packing of nano-powders Nikola Topic, D. E. Wolf, Thorsten Pöschel |
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Non-Uniformities in the angle of repose and packing fraction of large heaps of granular matter Nikola Topic, Jason Gallas, Thorsten Pöschel |