| Title: |
Control of microparticles through hydrodynamic interactions |
| Authors: |
Shum, Henry; Zoppello, Marta; Astwood, Michael; Morandotti, Marco |
| Contributors: |
Natural Sciences and Engineering Research Council of Canada; Ministero dell'Università e della Ricerca |
| Source: |
Journal of Fluid Mechanics ; volume 1004 ; ISSN 0022-1120 1469-7645 |
| Publisher Information: |
Cambridge University Press (CUP) |
| Publication Year: |
2025 |
| Description: |
The controllability of passive microparticles that are advected with the fluid flow generated by an actively controlled one is studied. The particles are assumed to be suspended in a viscous fluid and well separated so that the far-field Stokes flow solutions may be used to describe their interactions. Explicit elementary moves parametrized by an amplitude $\varepsilon >0$ are devised for the active particle. Applying concepts from geometric control theory, the leading-order resulting displacements of the passive particles in the limit $\varepsilon \to 0$ are used to propose strategies for moving one active particle and one or two passive particles, proving controllability in such systems. The leading-order (in $\varepsilon$ ) theoretical predictions of the particle displacements are compared with those obtained numerically and it is found that the discrepancy is small even when $\varepsilon \approx 1$ . These results demonstrate the potential for a single actuated particle to perform complex micromanipulations of passive particles in a suspension. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1017/jfm.2024.1186 |
| Availability: |
https://doi.org/10.1017/jfm.2024.1186; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022112024011868 |
| Rights: |
http://creativecommons.org/licenses/by/4.0 |
| Accession Number: |
edsbas.C44DCC00 |
| Database: |
BASE |