Turbulence-Induced Fluctuating Interfaces in Heterogeneously-Active Suspensions
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911667918471168 |
|---|---|
| author | Mukherjee, Siddhartha Kumar, Kunal Ray, Samriddhi Sankar |
| author_facet | Mukherjee, Siddhartha Kumar, Kunal Ray, Samriddhi Sankar |
| contents | We investigate the effects of heterogeneous (spatially varying) activity in a hydrodynamical model for dense bacterial suspensions, confining ourselves to experimentally realizable, simple, quenched, activity patterns. We show that the evolution of the bacterial velocity field under such activity patterning leads to the emergence of hydrodynamic interfaces separating spatially localized turbulence from jammed frictional surroundings. We characterise the intermittent and multiscale fluctuations of this interface and also investigate how heterogeneity influences mixing via the residence times of Lagrangian tracers. This work reveals how naturally occurring heterogeneities could decisively steer active flows into more complex configurations than those typically studied, opening up parallels to droplet dynamics, front propagation and turbulent mixing layers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_16443 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Turbulence-Induced Fluctuating Interfaces in Heterogeneously-Active Suspensions Mukherjee, Siddhartha Kumar, Kunal Ray, Samriddhi Sankar Soft Condensed Matter Chaotic Dynamics Computational Physics Fluid Dynamics We investigate the effects of heterogeneous (spatially varying) activity in a hydrodynamical model for dense bacterial suspensions, confining ourselves to experimentally realizable, simple, quenched, activity patterns. We show that the evolution of the bacterial velocity field under such activity patterning leads to the emergence of hydrodynamic interfaces separating spatially localized turbulence from jammed frictional surroundings. We characterise the intermittent and multiscale fluctuations of this interface and also investigate how heterogeneity influences mixing via the residence times of Lagrangian tracers. This work reveals how naturally occurring heterogeneities could decisively steer active flows into more complex configurations than those typically studied, opening up parallels to droplet dynamics, front propagation and turbulent mixing layers. |
| title | Turbulence-Induced Fluctuating Interfaces in Heterogeneously-Active Suspensions |
| topic | Soft Condensed Matter Chaotic Dynamics Computational Physics Fluid Dynamics |
| url | https://arxiv.org/abs/2502.16443 |