流动诱导的离线线在阴性液晶中
1Max Planck Institute for Dynamics and Self-Organization, (MPIDS), Am Faßberg 17, D-37077 Göttingen, Germany.
Physical review. E
|November 18, 2025
概括
在微流体通道中,流动的阴性液晶会因墙壁相互作用而产生离线线. 这些新的偏离形成在弹性力与流量剪切相遇的地方,其持久性取决于导体场.
科学领域:
- 软物质物理学 软物质物理学
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 阴性液晶在微流体系统中表现出独特的流动行为.
- 了解分离线的形成对于控制液晶对齐至关重要.
研究的目的:
- 为了数值地研究在微流体通道中与阴性液晶一起产生离谱线的产生.
- 分析流动诱导的弹性力和墙壁固条件在离线形成中的作用.
主要方法:
- 数字模拟的格子博尔茨曼方法.
- 模拟阴性液晶的水力动力学和弹性.
- 对导体场演变和分离动态的分析.
主要成果:
- 偏斜线,特别是扭曲偏斜线,是由流量和壁的相互作用产生的.
- 核化发生在弹性对齐力垂直于局部剪切平面的地方.
- 脱线行为 (持久性或消灭性) 取决于导演场的配置.
- 流动诱导的偏斜弧在不同的定条件的边界上形成.
结论:
- 数值模型准确地复制实验结果,验证了模拟方法.
- 流量和定条件是控制微流体液晶中偏离线生成的关键因素.
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