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706723.pdf (2.88 MB)

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2020-08-07

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cc-by (c) Scagliarini, Andrea et al., 2020
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/173711

Unravelling the role of phoretic and hydrodynamic interactions in active colloidal suspensions

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Recurs relacionat

https://doi.org/10.1039/C8SM01831F

Resum

Active fluids comprise a variety of systems composed of elements immersed in a fluid environment which can convert some form of energy into directed motion; as such they are intrinsically out-of-equilibrium in the absence of any external force. A fundamental problem in the physics of active matter concerns the understanding of how the characteristics of autonomous propulsion and agent-agent interactions determine the collective dynamics of the system. We study numerically the suspensions of self-propelled diffusiophoretic colloids, in (quasi)-2d configurations, accounting for both dynamically resolved solute-mediated phoretic interactions and solvent-mediated hydrodynamic interactions. Our results show that the system displays different scenarios at changing the colloid-solute affinity and it develops a cluster phase in the chemoattractive case. We study the statistics of cluster sizes and cluster morphologies for different magnitudes of colloidal activity. Finally, we provide evidences that hydrodynamics plays a relevant role in the aggregation kinetics and cluster morphology, significantly hindering cluster growth.

Matèries

Hidrodinàmica, Fenòmens mesoscòpics (Física)

Matèries (anglès)

Hydrodynamics, Mesoscopic phenomena (Physics)

Citació

Col·leccions

Articles publicats en revistes (Física de la Matèria Condensada)

Citació

SCAGLIARINI, Andrea and PAGONABARRAGA MORA, Ignacio. Unravelling the role of phoretic and hydrodynamic interactions in active colloidal suspensions. Soft Matter. 2020. Vol. 16, num. 8893-8903. ISSN 1744-683X. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/173711

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