Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings
A distinct particle focusing spot occurs in the center of a rotating fluid, presenting an apparent paradox given the presence of particle inertia. It is recognized, however, that the presence of a secondary flow with a radial component drives this particle aggregation. In this study, we expand on th...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/14/11/2024 |
| _version_ | 1797458381499269120 |
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| author | Kirill Kolesnik Daniel Quang Le Pham Jessica Fong David John Collins |
| author_facet | Kirill Kolesnik Daniel Quang Le Pham Jessica Fong David John Collins |
| author_sort | Kirill Kolesnik |
| collection | DOAJ |
| description | A distinct particle focusing spot occurs in the center of a rotating fluid, presenting an apparent paradox given the presence of particle inertia. It is recognized, however, that the presence of a secondary flow with a radial component drives this particle aggregation. In this study, we expand on the examination of this “Thomson–Einstein’s tea leaf paradox” phenomenon, where we use a combined experimental and computational approach to investigate particle aggregation dynamics. We show that not only the rotational velocity, but also the vessel shape, have a significant influence on a particle’s equilibrium position. We accordingly demonstrate the formation of a single focusing spot in a vessel center, as has been conclusively demonstrated elsewhere, but also the repeatable formation of stable ring-shaped particle arrangements. |
| first_indexed | 2024-03-09T16:36:17Z |
| format | Article |
| id | doaj.art-7a14b30a7ff846c0b7b2fc25e882eb03 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T16:36:17Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-7a14b30a7ff846c0b7b2fc25e882eb032023-11-24T14:56:17ZengMDPI AGMicromachines2072-666X2023-10-011411202410.3390/mi14112024Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in RingsKirill Kolesnik0Daniel Quang Le Pham1Jessica Fong2David John Collins3Department of Biomedical Engineering, University of Melbourne, Melbourne, VIC 3010, AustraliaDepartment of Biomedical Engineering, University of Melbourne, Melbourne, VIC 3010, AustraliaDepartment of Biomedical Engineering, University of Melbourne, Melbourne, VIC 3010, AustraliaDepartment of Biomedical Engineering, University of Melbourne, Melbourne, VIC 3010, AustraliaA distinct particle focusing spot occurs in the center of a rotating fluid, presenting an apparent paradox given the presence of particle inertia. It is recognized, however, that the presence of a secondary flow with a radial component drives this particle aggregation. In this study, we expand on the examination of this “Thomson–Einstein’s tea leaf paradox” phenomenon, where we use a combined experimental and computational approach to investigate particle aggregation dynamics. We show that not only the rotational velocity, but also the vessel shape, have a significant influence on a particle’s equilibrium position. We accordingly demonstrate the formation of a single focusing spot in a vessel center, as has been conclusively demonstrated elsewhere, but also the repeatable formation of stable ring-shaped particle arrangements.https://www.mdpi.com/2072-666X/14/11/2024tea leaf paradoxmicromanipulationstokes draghydrodynamic interactionscomputational fluid dynamics |
| spellingShingle | Kirill Kolesnik Daniel Quang Le Pham Jessica Fong David John Collins Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings Micromachines tea leaf paradox micromanipulation stokes drag hydrodynamic interactions computational fluid dynamics |
| title | Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings |
| title_full | Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings |
| title_fullStr | Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings |
| title_full_unstemmed | Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings |
| title_short | Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings |
| title_sort | thomson einstein s tea leaf paradox revisited aggregation in rings |
| topic | tea leaf paradox micromanipulation stokes drag hydrodynamic interactions computational fluid dynamics |
| url | https://www.mdpi.com/2072-666X/14/11/2024 |
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