Collective rotations of active particles interacting with obstacles
We consider active particles in a heterogeneous medium, modeled by static, random obstacles. In accordance with the known tendency of active particles to cluster, we observe accumulation and crystallization of active particles around the obstacles which serve as nucleation sites. In the limit of hig...
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Published in | Europhysics letters Vol. 120; no. 1; pp. 14001 - 14007 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Les Ulis
EDP Sciences, IOP Publishing and Società Italiana di Fisica
01.10.2017
IOP Publishing |
Subjects | |
Online Access | Get full text |
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Summary: | We consider active particles in a heterogeneous medium, modeled by static, random obstacles. In accordance with the known tendency of active particles to cluster, we observe accumulation and crystallization of active particles around the obstacles which serve as nucleation sites. In the limit of high activity, the crystals start to rotate spontaneously, resembling a rotating rigid body. We trace the occurrence of these oscillations to the enhanced attraction of particles whose orientation points along the rotational velocity as compared to those whose orientation points in the opposite direction. |
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Bibliography: | ark:/67375/80W-R82GXV6J-7 istex:42E9E38A52A3F90AB0B70AB4F52F93DC34FF0283 publisher-ID:epl18853 |
ISSN: | 0295-5075 1286-4854 |
DOI: | 10.1209/0295-5075/120/14001 |