Dancing disclinations in confined active nematics.
Dancing disclinations in confined active nematics.
复制标题
受限活性向列中的舞动向错。
作者：
T. Shendruk;A. Doostmohammadi;K. Thijssen;J. Yeomans
集体流的自发出现是活跃流体的一般属性，通常会导致混沌流模式，其特征是方向场中的漩涡、射流和拓扑向错。然而，实现结构化流动和有序向错的能力在主动系统的设计和控制中特别重要。通过将活性向列流体限制在通道内，我们发现了向错的规则运动，以及明确定义的动态涡旋晶格。当成对的移动向错穿过通道时，它们不断交换伙伴，产生动态有序状态，让人想起同乐会舞蹈。我们预计，这种在工程几何形状中自组装有组织的拓扑向错和动态结构流场的仿生能力将为建立新的主动拓扑微流体装置铺平道路。
The spontaneous emergence of collective flows is a generic property of active fluids and often leads to chaotic flow patterns characterised by swirls, jets, and topological disclinations in their orientation field. However, the ability to achieve structured flows and ordered disclinations is of particular importance in the design and control of active systems. By confining an active nematic fluid within a channel, we find a regular motion of disclinations, in conjunction with a well defined and dynamic vortex lattice. As pairs of moving disclinations travel through the channel, they continually exchange partners producing a dynamic ordered state, reminiscent of Ceilidh dancing. We anticipate that this biomimetic ability to self-assemble organised topological disclinations and dynamically structured flow fields in engineered geometries will pave the road towards establishing new active topological microfluidic devices.
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DOI：
10.1103/physreve.90.042304
发表时间：
2014-10
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
Putzig E;Baskaran A
通讯作者：
Baskaran A
影响因子：
8.6
作者：
Grossmann, Robert;Romanczuk, Pawel;Schimansky-Geier, Lutz
通讯作者：
Schimansky-Geier, Lutz
影响因子：
44.1
作者：
Marchetti, M. C.;Joanny, J. F.;Simha, R. Aditi
通讯作者：
Simha, R. Aditi
影响因子：
2.4
作者：
Fielding, S. M.;Marenduzzo, D.;Cates, M. E.
通讯作者：
Cates, M. E.
影响因子：
41.2
作者：
DeCamp SJ;Redner GS;Baskaran A;Hagan MF;Dogic Z
通讯作者：
Dogic Z