Fractal substructures due to fragmentation and reagglomeration

Wolf DE, Pöschel T, Schwager T, Weuster A, Brendel L (2009)

Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2009

Book Volume: 1145

Pages Range: 859-862

Event location: Golden, CO US

ISBN: 9780735406827

DOI: 10.1063/1.3180065

Abstract

Cohesive powders form agglomerates that can be very porous. Hence they are also very fragile. Consider a process of complete fragmentation on a characteristic length scale I, where the fragments are subsequently allowed to settle under gravity. If this fragmentation-reagglomeration cycle is repeated sufficiently often, the powder develops a fractal substructure with robust statistical properties. The structural evolution is discussed for two different models: The first one is an off-lattice model, in which a fragment does not stick to the surface of other fragments that have already settled, but rolls down until it finds a locally stable position. The second one is a simpler lattice model, in which a fragment sticks at first contact with the agglomerate of fragments that have already settled. Results for the fragment size distribution are shown as well. One can distinguish scale invariant dust and fragments of a characteristic size. Their role in the process of structure formation will be addressed. © 2009 American Institute of Physics.

Authors with CRIS profile

Thorsten Pöschel Lehrstuhl für Multiscale Simulation of Particulate Systems (MSS)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK e.V.) DE Germany (DE) Universität Duisburg-Essen (UDE) DE Germany (DE)

How to cite

APA:

Wolf, D.E., Pöschel, T., Schwager, T., Weuster, A., & Brendel, L. (2009). Fractal substructures due to fragmentation and reagglomeration. In Proceedings of the 6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009 (pp. 859-862). Golden, CO, US.

MLA:

Wolf, D. E., et al. "Fractal substructures due to fragmentation and reagglomeration." Proceedings of the 6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009, Golden, CO 2009. 859-862.

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