Migration of gyrotactic micro-organisms in surface gravity waves
文献类型：期刊论文
| 作者 | Zeng, Li7; Yang, Fan6; Wang, Bohan7; Jiang, Weiquan5; Guan MY(管明阳)4; Zhao, Yijun6; Wu, Zi1,2,3 |
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 37期号:8页码:18 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0279875 |
| 通讯作者 | Wang, Bohan(bohanwang@pku.edu.cn) ; Wu, Zi(wuzi@tsinghua.edu.cn) |
| 英文摘要 | Many micro-organisms such as phytoplankton commonly inhabit the upper layers of aquatic environments, where surface waves are prevalent. In this study, we investigate the migration of gyrotactic micro-organisms in surface gravity waves using two complementary approaches: a wave-averaged simplified continuum theory specific to spherical micro-swimmers, which combines Lagrangian Stokes drift with generalized Taylor dispersion theory, and a wave-resolved random walk simulation. We begin with a parametric analysis of gyrotaxis and swimming on dispersion. While both methods show that stronger gyrotaxis enhances gravitactic focusing near the surface, the random walk simulation additionally reveals a regime in which gyrotactic swimmers exhibit a mean vertical position below that of passive solute particles. The migration of non-spherical micro-swimmers is analyzed using the random walk simulation. Rod- and disc-like micro-swimmers display distinct transport behaviors due to their shape-induced orientation preferences, which either enhance or inhibit vertical focusing. Incorporating non-linear wave effects shows that all swimmer types experience increased drift velocities, but only disc-like swimmers exhibit significantly amplified longitudinal dispersion. Finally, the addition of a background current weakens gravitactic focusing in spherical swimmers, while inducing opposite responses in rod- and disc-like ones. Our findings highlight the crucial role of swimmers' taxes and morphology and wave-swimmer interactions in shaping vertical distributions and dispersion characteristics, offering insight into the prevalence of elongated forms among motile phytoplankton. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | LONGITUDINAL DISPERSION ; OSCILLATORY FLOWS ; TAYLOR DISPERSION ; CONTAMINANT ; MECHANISMS ; PARTICLES ; STEADY ; DRIFT |
| 资助项目 | National Key Research and Development Program of China10.13039/501100012166[2024YFC3210902] ; National Key R&D Program of China[HY0199A112021] ; IWHR Research and Development Support Program[SKL2024TS12] ; Independent Research Project of State Key Laboratory of Water Cycle and Water Security in River Basin[123B2039] ; National Natural Science Foundation of China[HY121003A0012025] ; Youth Talent Lifting Project of the Department of Hydraulics, IWHR[0018/2023/ITP1, 0025/2024/RIA1] ; Youth Talent Lifting Project of the Department of Hydraulics, IWHR[0001/2024/NRP] ; Science and Technology Development Fund (FDCT) of Macao SAR |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001551587400010 |
| 资助机构 | National Key Research and Development Program of China10.13039/501100012166 ; National Key R&D Program of China ; IWHR Research and Development Support Program ; Independent Research Project of State Key Laboratory of Water Cycle and Water Security in River Basin ; National Natural Science Foundation of China ; Youth Talent Lifting Project of the Department of Hydraulics, IWHR ; Science and Technology Development Fund (FDCT) of Macao SAR |
| 其他责任者 | Wang, Bohan ; Wu, Zi |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103771]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Tsinghua Univ, Dept Hydraul Engn, Beijing, Peoples R China 2.Tsinghua Univ, Key Lab Hydrosphere Sci, Minist Water Resources, Beijing, Peoples R China; 3.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing, Peoples R China; 5.Macau Univ Sci & Technol, Macao Environm Res Inst, Macau, Peoples R China; 6.China Inst Water Resources & Hydropower Res, Dept Hydraul, Beijing, Peoples R China; 7.China Inst Water Resources & Hydropower Res, State Key Lab Water Cycle & Water Secur River Basi, Beijing, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zeng, Li,Yang, Fan,Wang, Bohan,et al. Migration of gyrotactic micro-organisms in surface gravity waves[J]. PHYSICS OF FLUIDS,2025,37(8):18. |
| APA | Zeng, Li.,Yang, Fan.,Wang, Bohan.,Jiang, Weiquan.,管明阳.,...&Wu, Zi.(2025).Migration of gyrotactic micro-organisms in surface gravity waves.PHYSICS OF FLUIDS,37(8),18. |
| MLA | Zeng, Li,et al."Migration of gyrotactic micro-organisms in surface gravity waves".PHYSICS OF FLUIDS 37.8(2025):18. |
入库方式： OAI收割
来源：力学研究所
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