{"title":"探索主动湍流中的秩序:受限细菌涡旋中的几何规则和配对顺序转换。","authors":"Kazusa Beppu, Yusuke T Maeda","doi":"10.2142/biophysico.bppb-v19.0020","DOIUrl":null,"url":null,"abstract":"<p><p>Ordered collective motion emerges in a group of autonomously motile elements (known as active matter) as their density increases. Microswimmers, such as swimming bacteria, have been extensively studied in physics and biology. A dense suspension of bacteria forms seemingly chaotic turbulence in viscous fluids. Interestingly, this active turbulence driven by bacteria can form a hidden ensemble of many vortices. Understanding the active turbulence in a bacterial suspension can provide physical principles for pattern formation and insight into the instability underlying biological phenomena. This review presents recent findings regarding ordered structures causing active turbulence and discusses a physical approach for controlling active turbulence via geometric confinement. When the active matter is confined in a compartment with a size comparable to the correlation length of the collective motion, vortex-like rotation appears, and the vortex pairing order is indicated by the patterns of interacting vortices. Additionally, we outline the design principle for controlling collective motions via the geometric rule of the vortex pairing, which may advance engineering microdevices driven by a group of active matter. This article is an extended version of the Japanese article, Ordered Structure and Geometric Control of Active Matter in Dense Bacterial Suspensions, published in SEIBUTSU BUTSURI Vol. 60, p. 13-18 (2020).</p>","PeriodicalId":8976,"journal":{"name":"Biophysics and Physicobiology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ab/59/19_e190020.PMC9173862.pdf","citationCount":"1","resultStr":"{\"title\":\"Exploring order in active turbulence: Geometric rule and pairing order transition in confined bacterial vortices.\",\"authors\":\"Kazusa Beppu, Yusuke T Maeda\",\"doi\":\"10.2142/biophysico.bppb-v19.0020\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Ordered collective motion emerges in a group of autonomously motile elements (known as active matter) as their density increases. Microswimmers, such as swimming bacteria, have been extensively studied in physics and biology. A dense suspension of bacteria forms seemingly chaotic turbulence in viscous fluids. Interestingly, this active turbulence driven by bacteria can form a hidden ensemble of many vortices. Understanding the active turbulence in a bacterial suspension can provide physical principles for pattern formation and insight into the instability underlying biological phenomena. This review presents recent findings regarding ordered structures causing active turbulence and discusses a physical approach for controlling active turbulence via geometric confinement. When the active matter is confined in a compartment with a size comparable to the correlation length of the collective motion, vortex-like rotation appears, and the vortex pairing order is indicated by the patterns of interacting vortices. Additionally, we outline the design principle for controlling collective motions via the geometric rule of the vortex pairing, which may advance engineering microdevices driven by a group of active matter. This article is an extended version of the Japanese article, Ordered Structure and Geometric Control of Active Matter in Dense Bacterial Suspensions, published in SEIBUTSU BUTSURI Vol. 60, p. 13-18 (2020).</p>\",\"PeriodicalId\":8976,\"journal\":{\"name\":\"Biophysics and Physicobiology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-05-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ab/59/19_e190020.PMC9173862.pdf\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biophysics and Physicobiology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2142/biophysico.bppb-v19.0020\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2022/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biophysics and Physicobiology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2142/biophysico.bppb-v19.0020","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/1/1 0:00:00","PubModel":"eCollection","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
摘要
有序的集体运动出现在一组自主运动的元素(被称为活性物质),因为它们的密度增加。微游泳者,如游泳细菌,已经在物理学和生物学上得到了广泛的研究。稠密的细菌悬浮液在粘性流体中形成看似混乱的湍流。有趣的是,这种由细菌驱动的活跃湍流可以形成许多旋涡的隐藏集合。了解细菌悬浮液中的活跃湍流可以为模式形成提供物理原理,并深入了解生物现象背后的不稳定性。本文综述了引起主动湍流的有序结构的最新发现,并讨论了通过几何约束控制主动湍流的物理方法。当活性物质被限制在一个与集体运动相关长度相当的空间中时,就会出现涡状旋转,并通过相互作用的涡的模式来指示涡的配对顺序。此外,我们还概述了通过涡旋配对的几何规则控制集体运动的设计原理,这可能会推动由一组活性物质驱动的工程微器件。本文是日语文章《密集细菌悬浊液中活性物质的有序结构和几何控制》的扩展版,发表于SEIBUTSU BUTSURI Vol. 60, p. 13-18(2020)。
Exploring order in active turbulence: Geometric rule and pairing order transition in confined bacterial vortices.
Ordered collective motion emerges in a group of autonomously motile elements (known as active matter) as their density increases. Microswimmers, such as swimming bacteria, have been extensively studied in physics and biology. A dense suspension of bacteria forms seemingly chaotic turbulence in viscous fluids. Interestingly, this active turbulence driven by bacteria can form a hidden ensemble of many vortices. Understanding the active turbulence in a bacterial suspension can provide physical principles for pattern formation and insight into the instability underlying biological phenomena. This review presents recent findings regarding ordered structures causing active turbulence and discusses a physical approach for controlling active turbulence via geometric confinement. When the active matter is confined in a compartment with a size comparable to the correlation length of the collective motion, vortex-like rotation appears, and the vortex pairing order is indicated by the patterns of interacting vortices. Additionally, we outline the design principle for controlling collective motions via the geometric rule of the vortex pairing, which may advance engineering microdevices driven by a group of active matter. This article is an extended version of the Japanese article, Ordered Structure and Geometric Control of Active Matter in Dense Bacterial Suspensions, published in SEIBUTSU BUTSURI Vol. 60, p. 13-18 (2020).