Restructuring a passive colloidal suspension using a rotationally driven particle
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866917583316320256 |
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| author | Chen, Shih-Yuan Lopez-Rios, Hector de la Cruz, Monica Olvera Driscoll, Michelle M. |
| author_facet | Chen, Shih-Yuan Lopez-Rios, Hector de la Cruz, Monica Olvera Driscoll, Michelle M. |
| contents | The interaction between passive and active/driven particles has introduced a new way to control colloidal suspension properties from particle aggregation to crystallization. Here, we focus on the hydrodynamic interaction between a single rotational driven particle and a suspension of passive particles near the floor. Using experiments and Stokesian dynamics simulations that account for near-field lubrication, we demonstrate that the flow induced by the driven particle can induce long-ranged rearrangement in a passive suspension. We observe an accumulation of passive particles in front of the driven particle and a depletion of passive particles behind the driven particle. This restructuring generates a pattern that can span a range more than $10$ times of the driven particle's radius. We further show that size scale of the pattern is only a function of the particle's height above the floor. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_00255 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Restructuring a passive colloidal suspension using a rotationally driven particle Chen, Shih-Yuan Lopez-Rios, Hector de la Cruz, Monica Olvera Driscoll, Michelle M. Soft Condensed Matter Statistical Mechanics Fluid Dynamics The interaction between passive and active/driven particles has introduced a new way to control colloidal suspension properties from particle aggregation to crystallization. Here, we focus on the hydrodynamic interaction between a single rotational driven particle and a suspension of passive particles near the floor. Using experiments and Stokesian dynamics simulations that account for near-field lubrication, we demonstrate that the flow induced by the driven particle can induce long-ranged rearrangement in a passive suspension. We observe an accumulation of passive particles in front of the driven particle and a depletion of passive particles behind the driven particle. This restructuring generates a pattern that can span a range more than $10$ times of the driven particle's radius. We further show that size scale of the pattern is only a function of the particle's height above the floor. |
| title | Restructuring a passive colloidal suspension using a rotationally driven particle |
| topic | Soft Condensed Matter Statistical Mechanics Fluid Dynamics |
| url | https://arxiv.org/abs/2312.00255 |