计算物理 ›› 1999, Vol. 16 ›› Issue (6): 646-650.

• 论文 • 上一篇    下一篇

双轴分子构成向列型液晶中向列序的计算

张志东1,2, 张德贤1, 黄锡珉2   

  1. 1. 河北工业大学应用数理系, 天津 300130;
    2. 中国科学院长春物理研究所, 130021
  • 收稿日期:1998-06-23 出版日期:1999-11-25 发布日期:1999-11-25
  • 作者简介:张志东,男,38,教授,博士
  • 基金资助:
    河北省自然科学基金资助的项目

The calculation of nematic order in liquid crystals formed by biaxial molecules

Zhang Zhidong1,2, Zhang Dexian1, Huang Ximin2   

  1. 1. Department of Applied Mathematics and Physics, Hebei University of Technology, Tianjin, 300130;
    2. Changchun Institute of Physics, Chinese Academy of Sciences, 130021
  • Received:1998-06-23 Online:1999-11-25 Published:1999-11-25

摘要: 通过格胞理论研究双轴分子构成的向列型液晶。发展新的数值方法计算液晶中的向列序。不用任何函数展开,通过迭代方法求解平衡态方程,得到精确的取向分布函数。计算了序参数和单分子内能对温度的依赖关系。给出了有关物理量在向列相-各向同性相相变点的值。数值结果较分子场理论更接近于Monte Carlo 模拟的结果。

关键词: 双轴分子, 向列型液晶, 格胞理论, 迭代方法

Abstract: The cell theory is used to study nematic liquid crystals formed by biaxial molecules. A new numerical method is developed to calculate the nematic order in liquid crystals. Without any functional expansions, accurate orientational distribution functions are obtained by using a newly iterative method to solve the equation of equilibrium state. The temperature dependences of the order parameter and of the internal energy per molecule are calculated, and the values of the relevant physical quantities at the nematic isotropic phase transition are given. Numerical results are in better agreement with the Monte Carlo simulation results than those of the molecular field theory.

Key words: biaxial molecule, nematic liquid crystal, cell theory, iterative method

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