Active Particle Diffusion in Convection Roll Arrays
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866911104041484288 |
|---|---|
| author | Ghosh, Pulak Kumar Marchesoni, Fabio Li, Yunyun Nori, Franco |
| author_facet | Ghosh, Pulak Kumar Marchesoni, Fabio Li, Yunyun Nori, Franco |
| contents | We numerically investigated the Brownian motion of active Janus particles in a linear array of planar counter-rotating convection rolls at high Péclet numbers. Similarly to passive particles, active microswimmers exhibit advection enhanced diffusion, but only for self-propulsion speeds up to a critical value. The diffusion of faster Janus particles is governed by advection along the array's edges, whereby distinct diffusion regimes are observed and characterized. Contrary to passive particles, the relevant spatial distributions of active Janus particles are inhomogeneous. These peculiar properties of active matter are related to the combined action of noise and self-propulsion in a confined geometry and hold regardless of the actual flow boundary conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_09924 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Active Particle Diffusion in Convection Roll Arrays Ghosh, Pulak Kumar Marchesoni, Fabio Li, Yunyun Nori, Franco Statistical Mechanics We numerically investigated the Brownian motion of active Janus particles in a linear array of planar counter-rotating convection rolls at high Péclet numbers. Similarly to passive particles, active microswimmers exhibit advection enhanced diffusion, but only for self-propulsion speeds up to a critical value. The diffusion of faster Janus particles is governed by advection along the array's edges, whereby distinct diffusion regimes are observed and characterized. Contrary to passive particles, the relevant spatial distributions of active Janus particles are inhomogeneous. These peculiar properties of active matter are related to the combined action of noise and self-propulsion in a confined geometry and hold regardless of the actual flow boundary conditions. |
| title | Active Particle Diffusion in Convection Roll Arrays |
| topic | Statistical Mechanics |
| url | https://arxiv.org/abs/2508.09924 |