A finite element method for the generalized Ericksen model of nematic liquid crystals

A finite element method for the generalized Ericksen model of nematic liquid crystals
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向列液晶广义Ericksen模型的有限元方法

DOI:
10.1051/m2an/2019092
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发表时间:
2020
期刊:
Mathematical Modelling and Numerical Analysis
影响因子:
--
通讯作者:
Shawn W. Walker
Shawn W. Walker
中科院分区:
--
文献类型:
--
作者:
Shawn W. Walker

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我们考虑液晶的广义埃里克森模型,它是一种具有 8 个独立“弹性”常数的能量,取决于两个阶参数 n(导向器)和 s(可变取向度)。此外,我们针对该能量提出了一种新的有限元离散化,可以在不进行正则化的情况下处理简并椭圆部分,具有以下性质:它是稳定的并且它 Γ 收敛到连续能量。此外,它不需要网格是弱锐度的(这是我们之前工作中的一个重要假设)。此外,我们还包括其他效应,例如弱锚定(法向和切向),以及具有柔曲电和有序电效应的完全耦合静电。我们还提出了几个模拟(2D 和 3D)来说明不同弹性常数和电场参数的影响。
We consider the generalized Ericksen model of liquid crystals, which is an energy with 8 independent “elastic”constants that depends on two order parameters n (director) and s (variable degree of orientation). In addition, we present a new finite element discretization for this energy, that can handle the degenerate elliptic part without regularization, with the following properties: it is stable and it Γ-converges to the continuous energy. Moreover, it does not require the mesh to be weakly acute (which was an important assumption in our previous work). Furthermore, we include other effects such as weak anchoring (normal and tangential), as well as fully coupled electro-statics with flexo-electric and order-electric effects. We also present several simulations (in 2-D and 3-D) illustrating the effects of the different elastic constants and electric field parameters.
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发表时间: 2010-09
影响因子: 2.5
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