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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2406.00883 |
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| _version_ | 1866908422028394496 |
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| author | Antonov, Alexander P. Terkel, Matthew Schwarzendahl, Fabian Jan Rodríguez-Gallo, Carolina Tierno, Pietro Löwen, Hartmut |
| author_facet | Antonov, Alexander P. Terkel, Matthew Schwarzendahl, Fabian Jan Rodríguez-Gallo, Carolina Tierno, Pietro Löwen, Hartmut |
| contents | Microscopic particles flowing through narrow channels may accumulate near bifurcation points provoking flow reduction, clogging and ultimately chip breakage. Here we show that the full flow behavior of colloidal particles through a microfluidic Y-junction (i.e. a three way intersection) can be controlled by tuning the pair interactions and the degree of confinement. By combining experiments with numerical simulations, we investigate the dynamic states emerging when magnetizable colloids flow through a symmetric Y-junction such that a single particle can pass through both gates with the same probability. We show that clogging can be avoided by repulsive interactions and branching into the two channels can be steered as well by interactions: attractive particles are flowing through the same gate, while repulsive colloids alternate between the two gates. Even details of the particle assembly such as buckling at the exit gate are tunable by interactions and the channel geometry. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_00883 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Controlling Colloidal Flow through a Microfluidic Y-junction Antonov, Alexander P. Terkel, Matthew Schwarzendahl, Fabian Jan Rodríguez-Gallo, Carolina Tierno, Pietro Löwen, Hartmut Soft Condensed Matter Statistical Mechanics Microscopic particles flowing through narrow channels may accumulate near bifurcation points provoking flow reduction, clogging and ultimately chip breakage. Here we show that the full flow behavior of colloidal particles through a microfluidic Y-junction (i.e. a three way intersection) can be controlled by tuning the pair interactions and the degree of confinement. By combining experiments with numerical simulations, we investigate the dynamic states emerging when magnetizable colloids flow through a symmetric Y-junction such that a single particle can pass through both gates with the same probability. We show that clogging can be avoided by repulsive interactions and branching into the two channels can be steered as well by interactions: attractive particles are flowing through the same gate, while repulsive colloids alternate between the two gates. Even details of the particle assembly such as buckling at the exit gate are tunable by interactions and the channel geometry. |
| title | Controlling Colloidal Flow through a Microfluidic Y-junction |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2406.00883 |