Dynamical clustering and wetting phenomena in inertial active matter
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917683095666688 |
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| author | Caprini, Lorenzo Breoni, Davide Ldov, Anton Scholz, Christian Löwen, Hartmut |
| author_facet | Caprini, Lorenzo Breoni, Davide Ldov, Anton Scholz, Christian Löwen, Hartmut |
| contents | Dynamical clustering represents a characteristic feature of active matter consisting of self-propelled agents that convert energy from the environment into mechanical motion. At the micron scale, typical of overdamped dynamics, particles with opposite motility block each other and show transient dynamical arrest that can induce cluster nucleation and motility-induced phase separation. However, for macroscopic agents, inertia plays a leading role, and clustering is strongly affected by bounce-back effects during collisions that could inhibit cluster growth. Here we present an experiment on the clustering of active granular particles, in which inertia can be systematically tuned. A plethora of new phenomena impacted severely by inertia is presented. Clusters display an inertia-induced transition from liquid-like to crystal-like inner structures that is accompanied by the suppression of cluster nucleation at system boundaries due to particle inertia. In contrast to microswimmers, where active particles wet the boundary by primarily forming clusters attached to the container walls, in an underdamped inertial active system, walls do not favor cluster formation and effectively annihilate motility-induced wetting phenomena. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_01038 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dynamical clustering and wetting phenomena in inertial active matter Caprini, Lorenzo Breoni, Davide Ldov, Anton Scholz, Christian Löwen, Hartmut Soft Condensed Matter Statistical Mechanics Dynamical clustering represents a characteristic feature of active matter consisting of self-propelled agents that convert energy from the environment into mechanical motion. At the micron scale, typical of overdamped dynamics, particles with opposite motility block each other and show transient dynamical arrest that can induce cluster nucleation and motility-induced phase separation. However, for macroscopic agents, inertia plays a leading role, and clustering is strongly affected by bounce-back effects during collisions that could inhibit cluster growth. Here we present an experiment on the clustering of active granular particles, in which inertia can be systematically tuned. A plethora of new phenomena impacted severely by inertia is presented. Clusters display an inertia-induced transition from liquid-like to crystal-like inner structures that is accompanied by the suppression of cluster nucleation at system boundaries due to particle inertia. In contrast to microswimmers, where active particles wet the boundary by primarily forming clusters attached to the container walls, in an underdamped inertial active system, walls do not favor cluster formation and effectively annihilate motility-induced wetting phenomena. |
| title | Dynamical clustering and wetting phenomena in inertial active matter |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2406.01038 |