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Title: Archimedes' law and its corrections for an active particle in a granular sea
Authors: Maes, Christian ×
Thomas, Simi R #
Issue Date: Jul-2011
Publisher: Institute of Physics Publishing
Series Title: Journal of Physics A, Mathematical and Theoretical vol:44 issue:28 pages:-
Article number: 285001
Abstract: We study the origin of buoyancy forces acting on a larger particle moving in a granular medium subject to horizontal shaking and its corrections before fluidization. In the fluid limit, Archimedes' law is verified, before the limit memory effects counteract buoyancy, as also found experimentally. The origin of the friction is an excluded volume effect between active particles, which we study more exactly for a random walker in a random environment. The same excluded volume effect is also responsible for the mutual attraction between bodies moving in the granular medium. Our theoretical modeling proceeds via an asymmetric exclusion process, i.e. via a dissipative lattice gas dynamics simulating the position degrees of freedom of a low density granular sea.
ISSN: 1751-8113
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
× corresponding author
# (joint) last author

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