https://doi.org/10.1140/epjp/s13360-025-06574-9
Regular Article
Motion behavior of self-propelled coupled particle ring swarms in 2D channels with varying boundaries
School of Mechanics and Optoelectronic Physics, Anhui University of Science and Technology, 232001, Huainan, Anhui, People’s Republic of China
Received:
21
March
2025
Accepted:
22
June
2025
Published online:
7
July
2025
Studies on Brownian motion have primarily investigated the directional rectification of particle movement. Notably, the rectification effect in Brownian systems has been found to correlate strongly with the steepness of the boundary potential. In this work, we systematically analyze the collective dynamics of coupled particle systems under boundaries with varying curvature. Our findings demonstrate that the directional motion emerges from the asymmetric nature of the potential energy landscape. Intriguingly, the average velocity exhibits a peak-shaped dependence on the curvature degree, while the effective diffusion coefficient decreases monotonically with increasing curvature. We further identify an optimal particle density that maximizes the mean velocity. Temperature-dependent analysis reveals a positive correlation between thermal energy and the system’s diffusion coefficient. This investigation not only advances our understanding of boundary effects in coupled Brownian systems but also provides potential implications for studying drug molecule dynamics in heterogeneous vascular structures.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
