Anisotropic particles focusing effect in complex flows
Finite-size effects can lead neutrally buoyant particles to exhibit different dynamics than tracer particles, and can alter their transport properties in fluid flows. Here we investigate the effect of the particle's shape on their dispersion in two-dimensional complex flows. Combining numerical...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024
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| Online Access: | https://hdl.handle.net/1721.1/154075 |
| _version_ | 1811080823291510784 |
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| author | Atis, Séverine Leclair, Matthieu Sapsis, Themistoklis P. Peacock, Thomas |
| author_facet | Atis, Séverine Leclair, Matthieu Sapsis, Themistoklis P. Peacock, Thomas |
| author_sort | Atis, Séverine |
| collection | MIT |
| description | Finite-size effects can lead neutrally buoyant particles to exhibit different dynamics than tracer particles, and can alter their transport properties in fluid flows. Here we investigate the effect of the particle's shape on their dispersion in two-dimensional complex flows. Combining numerical simulations with laboratory experiments, we show that particles with isotropic and anisotropic shapes exhibit different Lagrangian coherent structures, resulting in distinct dispersion phenomena within a given flow field. Experiments with rod-shaped particles show a focusing effect in the vicinity of vortex cores. We present a simple model that describes the dynamics of neutrally buoyant ellipsoidal particles in two-dimensional flow and show that particle aspect ratio and orientation-dependent forces can generate clustering phenomena in vortices. |
| first_indexed | 2024-09-23T11:37:26Z |
| format | Article |
| id | mit-1721.1/154075 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:37:26Z |
| publishDate | 2024 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1540752024-09-19T05:44:08Z Anisotropic particles focusing effect in complex flows Atis, Séverine Leclair, Matthieu Sapsis, Themistoklis P. Peacock, Thomas Fluid Flow and Transfer Processes Modeling and Simulation Computational Mechanics Finite-size effects can lead neutrally buoyant particles to exhibit different dynamics than tracer particles, and can alter their transport properties in fluid flows. Here we investigate the effect of the particle's shape on their dispersion in two-dimensional complex flows. Combining numerical simulations with laboratory experiments, we show that particles with isotropic and anisotropic shapes exhibit different Lagrangian coherent structures, resulting in distinct dispersion phenomena within a given flow field. Experiments with rod-shaped particles show a focusing effect in the vicinity of vortex cores. We present a simple model that describes the dynamics of neutrally buoyant ellipsoidal particles in two-dimensional flow and show that particle aspect ratio and orientation-dependent forces can generate clustering phenomena in vortices. 2024-04-04T19:55:28Z 2024-04-04T19:55:28Z 2022-08-26 2024-04-04T19:44:35Z Article http://purl.org/eprint/type/JournalArticle 2469-990X https://hdl.handle.net/1721.1/154075 Atis, Séverine, Leclair, Matthieu, Sapsis, Themistoklis P. and Peacock, Thomas. 2022. "Anisotropic particles focusing effect in complex flows." Physical Review Fluids, 7 (8). en 10.1103/physrevfluids.7.084503 Physical Review Fluids Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society |
| spellingShingle | Fluid Flow and Transfer Processes Modeling and Simulation Computational Mechanics Atis, Séverine Leclair, Matthieu Sapsis, Themistoklis P. Peacock, Thomas Anisotropic particles focusing effect in complex flows |
| title | Anisotropic particles focusing effect in complex flows |
| title_full | Anisotropic particles focusing effect in complex flows |
| title_fullStr | Anisotropic particles focusing effect in complex flows |
| title_full_unstemmed | Anisotropic particles focusing effect in complex flows |
| title_short | Anisotropic particles focusing effect in complex flows |
| title_sort | anisotropic particles focusing effect in complex flows |
| topic | Fluid Flow and Transfer Processes Modeling and Simulation Computational Mechanics |
| url | https://hdl.handle.net/1721.1/154075 |
| work_keys_str_mv | AT atisseverine anisotropicparticlesfocusingeffectincomplexflows AT leclairmatthieu anisotropicparticlesfocusingeffectincomplexflows AT sapsisthemistoklisp anisotropicparticlesfocusingeffectincomplexflows AT peacockthomas anisotropicparticlesfocusingeffectincomplexflows |