ArticleThe European physical journal. E, Soft matter2020
Emergent collective dynamics of bottom-heavy squirmers under gravity.
Article in The European physical journal. E, Soft matter, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Metabolic activity controls the emergence of coherent flows in microbial suspensions.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Optimal navigation of a smart active particle: directional and distance sensing.The European physical journal. E, Soft matter · 2023Article
- Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers.Soft matter · 2022Article
- Gyrotactic cluster formation of bottom-heavy squirmers.The European physical journal. E, Soft matter · 2022Article
- Editorial: Motile active matter.The European physical journal. E, Soft matter · 2021Article
- Self-propulsion in 2D confinement: phoretic and hydrodynamic interactions.The European physical journal. E, Soft matter · 2021Article
- Regimes of motion of magnetocapillary swimmers.The European physical journal. E, Soft matter · 2021Article
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Authors and funding
2 authors.
Funding
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Abstract
We present the results of hydrodynamic simulations using the method of multi-particle collision dynamics for a system of squirmer microswimmers moving under the influence of gravity at low Reynolds numbers. In addition, the squirmers are bottom-heavy so that they experience a torque which aligns them along the vertical. The squirmers interact hydrodynamically by the flow fields of a stokeslet and rotlet, which are initiated by the acting gravitational force and torque, respectively, and by their own flow fields. By varying the ratio of swimming to bulk sedimentation velocity and the torque, we determine state diagrams for the emergent collective dynamics of neutral squirmers as well as strong pushers and pullers. For low swimming velocity and torque we observe conventional sedimentation, while the sedimentation profile becomes inverted when their values are increased. For neutral squirmers we discover convective rolls of circulating squirmers between both sedimentation states, which sit at the bottom of the system and are fed by plumes made of collectively sinking squirmers. At larger torques porous clusters occur that spawn single squirmers. The two latter states can also occur transiently starting from a uniform squirmer distribution and then disappear in the long-time limit. For strong pushers and pullers only weak plume formation is observed.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.