Theory of defect motion in 2D passive and active nematic liquid crystals.
Theory of defect motion in 2D passive and active nematic liquid crystals.
复制标题
二维被动和主动向列液晶中的缺陷运动理论。
作者：
Xingzhou Tang;Jonathan V Selinger
拓扑缺陷的运动是所有液晶动力学的一个重要特征，在活性液晶中尤为明显。理解缺陷运动是一个具有挑战性的理论问题，因为取向有序的动力学与流体的回流是耦合的，而且因为液晶具有几个不同的粘性系数。在这里，我们建议一种粗粒度的变分方法，它将缺陷的运动描述为有效的“粒子”。对于被动液晶，该理论说明了阻力如何依赖于缺陷取向，并说明了平动和旋转运动之间的耦合。对于活性液晶，该理论提供了另一种描述由活度系数引起的运动的方法。
The motion of topological defects is an important feature of the dynamics of all liquid crystals, and is especially conspicuous in active liquid crystals. Understanding defect motion is a challenging theoretical problem, because the dynamics of orientational order is coupled with backflow of the fluid, and because a liquid crystal has several distinct viscosity coefficients. Here, we suggest a coarse-grained, variational approach, which describes the motion of defects as effective "particles". For passive liquid crystals, the theory shows how the drag depends on defect orientation, and shows the coupling between translational and rotational motion. For active liquid crystals, the theory provides an alternative way to describe motion induced by the activity coefficient.
影响因子：
44.1
作者：
Marchetti, M. C.;Joanny, J. F.;Simha, R. Aditi
通讯作者：
Simha, R. Aditi
各向异性二维流体中的缺陷相互作用
影响因子：
8.6
作者：
R. Stannarius;K. Harth
通讯作者：
K. Harth
影响因子：
41.2
作者：
DeCamp SJ;Redner GS;Baskaran A;Hagan MF;Dogic Z
通讯作者：
Dogic Z