2012年12月
Dynamic Coupling between a Multistable Defect Pattern and Flow in Nematic Liquid Crystals Confined in a Porous Medium
PHYSICAL REVIEW LETTERS
- 巻
- 109
- 号
- 25
- 開始ページ
- 257801
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.109.257801
- 出版者・発行元
- AMER PHYSICAL SOC
When a nematic liquid crystal is confined in a porous medium with strong anchoring conditions, topological defects, called disclinations, are stably formed with numerous possible configurations. Since the energy barriers between them are large enough, the system shows multistability. Our lattice Boltzmann simulations demonstrate dynamic couplings between the multistable defect pattern and the flow in a regular porous matrix. At sufficiently low flow speed, the topological defects are pinned at the quiescent positions. As the flow speed is increased, the defects show cyclic motions and nonlinear rheological properties, which depend on whether or not they are topologically constrained in the porous networks. In addition, we discover that the defect pattern can be controlled by controlling the flow. Thus, the flow path is recorded in the porous channels owing to the multistability of the defect patterns. DOI: 10.1103/PhysRevLett. 109.257801
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevLett.109.257801
- ISSN : 0031-9007
- Web of Science ID : WOS:000312841700014