Orientational instabilities in nematics with weak anchoring under combined action of steady flow and external fields

Director alignment at the nematic-isotropic interface: elastic anisotropy and active anchoring

Activity in nematics drives interfacial flows that lead to preferential alignment that is tangential or planar for extensile systems (pushers) and perpendicular or homeotropic for contractile ones (pullers). This alignment is known as active anchoring and has been reported for a number of systems and described using active nematic hydrodynamic theories. The latter are based on the one-elastic constant approximation, i.e., they assume elastic isotropy of the underlying passive nematic. Real nematics, however, have different elastic constants, which lead to interfacial anchoring. In this paper, …

具有一般取向序状态的向列液晶薄膜的流体动力学模型

A hydrodynamical model of nematic liquid crystal films with a general state of orientational order

本文基于广义 Onsager 原理和 Beris–Edwards 系统，构建了静止曲面上任意取向向列液晶薄膜的 Q-tensor 与切向不可压缩黏性流动耦合模型，并通过数值实验验证其动力学性质。

平面上的活性向列-各向同性界面：锚定、有序场和活性的影响

Active nematic-isotropic interfaces on flat surfaces: effects of anchoring, ordering field and activity

本文研究了活性向列-各向同性界面受锚定、有序场和活性影响，发现活性界面存在被动类似和传播两种动态状态，并驱动非稳态界面。

Note on the hydrodynamic description of thin nematic films: strong anchoring model

We discuss the long-wave hydrodynamic model for a thin film of nematic liquid crystal in the limit of strong anchoring at the free surface and at the substrate. We rigorously clarify how the elastic energy enters the evolution equation for the film thickness in order to provide a solid basis for further investigation: several conflicting models exist in the literature that predict qualitatively different behaviour. We consolidate the various approaches and show that the long-wave model derived through an asymptotic expansion of the full nemato-hydrodynamic equations with consistent boundary co…

Weak Anchoring and Surface Elasticity Effects in Electroosmotic Flow of Nematic Liquid Crystals Through Narrow Confinements

Advent of nematic liquid crystals flows have attracted renewed attention in view of microfluidic transport phenomena. Among various transport processes, electroosmosis stands as one of the efficient flow actuation method through narrow confinement. In the present study, we explore the electrically actuated flow of a nematic fluid with ionic inclusions taking into account the influences from surface induced elastic and electrical double layer phenomena. Influence of surface effects on the flow characteristics is known to get augmented in micro-confined environment and must be properly addressed…

活性向列相对可变形物体或边界的响应：弹性形变与锚定诱导流动

Active nematic response to a deformable body or boundary: elastic deformations and anchoring-induced flow

本文用复变量方法解析二维活性向列相中线弹性物体的流动、指向矢、牵引力与形变，揭示活性应力和锚定条件诱导的效应及应力测量新思路。