粘弹性封闭会导致活体体质中的周期性流量逆转
Francesco Mori1, Saraswat Bhattacharyya1, Julia M Yeomans1
1Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3PU, United Kingdom.
Physical review. E
|January 20, 2024
概括
限制在粘弹性通道中的活体阴性体在高活性时表现出不稳定性. 在临界弹性以下,由于活动和粘性弹性之间的相互作用,发生自发振荡和流量逆转.
科学领域:
- 软物质物理学 软物质物理学
- 活动物质动力学
- 非平衡系统 非平衡系统
背景情况:
- 活跃的体是具有自我推进的复杂流体.
- 限制活性物质影响其新出现的行为.
- 粘性弹性材料具有粘性和弹性两种特性.
研究的目的:
- 在粘弹性通道中研究活体阴性体的动态行为.
- 确定导致不稳定和模式形成的条件.
- 探索粘性弹性在控制活性物质动态中的作用.
主要方法:
- 线性稳定性分析以确定不稳定性值.
- 混合格子博尔兹曼模拟用于动态模拟.
- 阶段图构造用于映射不同的动态模式.
主要成果:
- 一个有序的活跃体在关键活动水平以上变得不稳定.
- 高通道弹性导致稳定流动状态.
- 在值弹性模量以下,出现自发振荡和周期性流量逆转.
结论:
- 活动和粘性弹性的相互作用驱动自发振荡.
- 粘弹性封闭对于活性物质的时空组织至关重要.
- 结果表明,试验途径可以控制活性物质.
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