Focusing of active particles in a converging flow
We consider active particles swimming in a convergent fluid flow in a trapezoid nozzle with no-slip walls. We use mathematical modeling to analyze trajectories of these particles inside the nozzle. By extensive Monte Carlo simulations, we show that trajectories are strongly affected by the backgroun...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa94fd |
| _version_ | 1827873485054017536 |
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| author | Mykhailo Potomkin Andreas Kaiser Leonid Berlyand Igor Aranson |
| author_facet | Mykhailo Potomkin Andreas Kaiser Leonid Berlyand Igor Aranson |
| author_sort | Mykhailo Potomkin |
| collection | DOAJ |
| description | We consider active particles swimming in a convergent fluid flow in a trapezoid nozzle with no-slip walls. We use mathematical modeling to analyze trajectories of these particles inside the nozzle. By extensive Monte Carlo simulations, we show that trajectories are strongly affected by the background fluid flow and geometry of the nozzle leading to wall accumulation and upstream motion (rheotaxis). In particular, we describe the non-trivial focusing of active rods depending on physical and geometrical parameters. It is also established that the convergent component of the background flow leads to stability of both downstream and upstream swimming at the centerline. The stability of downstream swimming enhances focusing, and the stability of upstream swimming enables rheotaxis in the bulk. |
| first_indexed | 2024-03-12T16:37:42Z |
| format | Article |
| id | doaj.art-a84ce4f0afa642088c6e1fd8dd69fdc3 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:37:42Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a84ce4f0afa642088c6e1fd8dd69fdc32023-08-08T14:48:25ZengIOP PublishingNew Journal of Physics1367-26302017-01-01191111500510.1088/1367-2630/aa94fdFocusing of active particles in a converging flowMykhailo Potomkin0Andreas Kaiser1Leonid Berlyand2Igor Aranson3Department of Mathematics, Pennsylvania State University , University Park, 16802, United States of AmericaMaterials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, United States of AmericaDepartment of Mathematics, Pennsylvania State University , University Park, 16802, United States of AmericaDepartment of Mathematics, Pennsylvania State University , University Park, 16802, United States of America; Department of Biomedical Engineering, Pennsylvania State University , University Park, 16802, United States of AmericaWe consider active particles swimming in a convergent fluid flow in a trapezoid nozzle with no-slip walls. We use mathematical modeling to analyze trajectories of these particles inside the nozzle. By extensive Monte Carlo simulations, we show that trajectories are strongly affected by the background fluid flow and geometry of the nozzle leading to wall accumulation and upstream motion (rheotaxis). In particular, we describe the non-trivial focusing of active rods depending on physical and geometrical parameters. It is also established that the convergent component of the background flow leads to stability of both downstream and upstream swimming at the centerline. The stability of downstream swimming enhances focusing, and the stability of upstream swimming enables rheotaxis in the bulk.https://doi.org/10.1088/1367-2630/aa94fdactive matterrheotaxisfocusingconverging flowconfinement |
| spellingShingle | Mykhailo Potomkin Andreas Kaiser Leonid Berlyand Igor Aranson Focusing of active particles in a converging flow New Journal of Physics active matter rheotaxis focusing converging flow confinement |
| title | Focusing of active particles in a converging flow |
| title_full | Focusing of active particles in a converging flow |
| title_fullStr | Focusing of active particles in a converging flow |
| title_full_unstemmed | Focusing of active particles in a converging flow |
| title_short | Focusing of active particles in a converging flow |
| title_sort | focusing of active particles in a converging flow |
| topic | active matter rheotaxis focusing converging flow confinement |
| url | https://doi.org/10.1088/1367-2630/aa94fd |
| work_keys_str_mv | AT mykhailopotomkin focusingofactiveparticlesinaconvergingflow AT andreaskaiser focusingofactiveparticlesinaconvergingflow AT leonidberlyand focusingofactiveparticlesinaconvergingflow AT igoraranson focusingofactiveparticlesinaconvergingflow |