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Ideal circle microswimmers in crowded media

Microswimmers are exposed in nature to crowded environments and their transport properties depend in a subtle way on the interaction with obstacles. Here, we investigate a model for a single ideal circle swimmer exploring a two-dimensional disordered array of impenetrable obstacles. The microswimmer...

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Detalles Bibliográficos
Autores principales: Chepizhko, Oleksandr, Franosch, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336149/
https://www.ncbi.nlm.nih.gov/pubmed/30574653
http://dx.doi.org/10.1039/c8sm02030b
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author Chepizhko, Oleksandr
Franosch, Thomas
author_facet Chepizhko, Oleksandr
Franosch, Thomas
author_sort Chepizhko, Oleksandr
collection PubMed
description Microswimmers are exposed in nature to crowded environments and their transport properties depend in a subtle way on the interaction with obstacles. Here, we investigate a model for a single ideal circle swimmer exploring a two-dimensional disordered array of impenetrable obstacles. The microswimmer moves on circular orbits in the freely accessible space and follows the surface of an obstacle for a certain time upon collision. Depending on the obstacle density and the radius of the circular orbits, the microswimmer displays either long-range transport or is localized in a finite region. We show that there are transitions from two localized states to a diffusive state each driven by an underlying static percolation transition. We determine the non-equilibrium state diagram and calculate the mean-square displacements and diffusivities by computer simulations. Close to the transition lines transport becomes subdiffusive which is rationalized as a dynamic critical phenomenon.
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spelling pubmed-63361492019-02-11 Ideal circle microswimmers in crowded media Chepizhko, Oleksandr Franosch, Thomas Soft Matter Chemistry Microswimmers are exposed in nature to crowded environments and their transport properties depend in a subtle way on the interaction with obstacles. Here, we investigate a model for a single ideal circle swimmer exploring a two-dimensional disordered array of impenetrable obstacles. The microswimmer moves on circular orbits in the freely accessible space and follows the surface of an obstacle for a certain time upon collision. Depending on the obstacle density and the radius of the circular orbits, the microswimmer displays either long-range transport or is localized in a finite region. We show that there are transitions from two localized states to a diffusive state each driven by an underlying static percolation transition. We determine the non-equilibrium state diagram and calculate the mean-square displacements and diffusivities by computer simulations. Close to the transition lines transport becomes subdiffusive which is rationalized as a dynamic critical phenomenon. Royal Society of Chemistry 2019-01-21 2018-12-13 /pmc/articles/PMC6336149/ /pubmed/30574653 http://dx.doi.org/10.1039/c8sm02030b Text en This journal is © The Royal Society of Chemistry 2019 http://creativecommons.org/licenses/by/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0)
spellingShingle Chemistry
Chepizhko, Oleksandr
Franosch, Thomas
Ideal circle microswimmers in crowded media
title Ideal circle microswimmers in crowded media
title_full Ideal circle microswimmers in crowded media
title_fullStr Ideal circle microswimmers in crowded media
title_full_unstemmed Ideal circle microswimmers in crowded media
title_short Ideal circle microswimmers in crowded media
title_sort ideal circle microswimmers in crowded media
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336149/
https://www.ncbi.nlm.nih.gov/pubmed/30574653
http://dx.doi.org/10.1039/c8sm02030b
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