Effect of an external field on the director profile of a nematic liquid crystal around a spherical particle

Jun Ichi Fukuda, Hiroshi Yokoyama

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

In our previous study we have demonstrated that an adaptive mesh refinement scheme can be effectively used to investigate the orientation profiles of a nematic liquid crystal around a spherical particle when the characteristic size of the defect core is much smaller than the particle radius. We have also shown that the dynamics of a nematic liquid crystal can be properly treated to reproduce the experimentally observed structural transition from the hedgehog to the Saturn ring configuration induced by an external field. As a preliminary study for the quantitative investigation of this transition, we study in this article how the choice of the criterion for mesh refinement/unrefinement influences the stability of the hedgehog under an external field in our numerical system. The severer is the criterion for mesh refinement to produce a larger number of fine grids, the weaker field can induce the transition. Nevertheless, the dependence of the critical field strength on the criterion for mesh refinement is weak and the criterion can be systematically controlled. Therefore our numerical scheme is shown to be safely applied to the quantitative study on the stability of the hedgehog configuration under an external field.

本文言語英語
ページ(範囲)165-172
ページ数8
ジャーナルMolecular Crystals and Liquid Crystals
475
1
DOI
出版ステータス出版済み - 1 1 2007
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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