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封闭性阴性微游泳者的合作性:从一个到许多
Shubhadeep Mandal1, Thomas J Mason2, Anthony C Croft3
1Indian Institute of Science, Department of Mechanical Engineering, Bengaluru 560012, India.
Physical review letters
|April 11, 2025
概括
在液晶中控制微游泳器是具有挑战性的. 这项研究揭示了封闭和流体特性如何影响它们的运动,从而使新的活性物质应用成为可能.
科学领域:
- 活动物质物理学 活动物质物理学
- 柔软的凝聚物质 软的凝聚物质
- 微水力学是微水力学.
背景情况:
- 控制微游泳者的行为对于开发新型活性物质应用至关重要.
- 几何限制是控制软物质系统的常见策略.
- 在异性流体中微游泳者的动力学,特别是在固体接口附近,比在牛顿流体中理解的要少.
研究的目的:
- 为了研究微游泳者的动态行为,在一个被固体墙所限制的阴性液晶中.
- 了解限制,推进强度和流体异构性对微游泳器动态的影响.
- 探索活跃体系统中的合作行为和控制机制.
主要方法:
- 纳米多粒子碰撞动力学 (NMCD) 模拟用于模拟微游泳者的行为.
- 分析建模被用来补充模拟结果并阐明潜在的物理机制.
- 这项研究考虑了孤立的战斗机和具有多个交互战斗机的系统.
主要成果:
- 一个丰富的相位图被确定为孤立的者,包括振荡动力学弱推力器,依赖于推进强度和限制.
- 理论模型表明,强力双极,源双极和源四极奇点对于内马体流体的振荡是必要的,与同位流体不同.
- 合作行为在推进型战斗机中随着数量的增加而出现,而拉动器的流场则干扰了彼此的运动.
结论:
- 线形力学扭矩,墙体诱导的弹性排斥和活性流之间的相互作用为控制和运输微游泳器在活性线形力学系统中的机会提供了机会.
- 与异性流体相比,异性流体的特性和几何限制显著改变了微游泳器的动态.
- 这些发现为设计先进的基于微游泳器的设备和应用提供了一条途径.
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