在活跃流中被动滴滴的异常动态
Chamkor Singh1, Abhishek Chaudhuri2
1Department of Physics, Central University of Punjab, Bathinda, India. chamkor.singh@cup.edu.in.
Nature communications
|May 2, 2024
概括
活性液晶中的被动可变形滴滴运动显示了尺寸依赖的扩散过渡. 它的运动,以"运行"和"停留"为特征,受流量相关性和滴滴大小的影响,影响细胞内和体外系统.
科学领域:
- 软物质物理学 软物质物理学
- 活体物质系统是什么
- 水力动力学就是水力动力学.
背景情况:
- 在活跃环境中研究被动可变形物体对于理解生物系统 (如细胞内运动) 和工程系统 (如细菌群) 至关重要.
- 准确的理论建模需要精确的水力动力学来捕捉活动流体内的物体周围的时空相关性.
研究的目的:
- 模拟和理解被动阴性液晶滴在活性阴性液晶浴中悬浮的运动和变形.
- 为了研究活跃应力,滴滴大小和界面张力对滴滴动力学和传输特性的影响.
主要方法:
- 利用合的水力动力学方程来建模具有有限活性应力的活体阴性液晶浴.
- 在这个活跃环境中模拟了一个悬浮的被动阴性液滴,在这个活跃环境中没有活动.
- 分析了滴滴变形,运动模式 (运行和停留) 和平均平方位移.
主要成果:
- 观察到滴滴变形波动和明显的"运行"和"停留"运动模式.
- 发现在较低的界面张力下,滴滴可以分解并与活性浴混合.
- 确定滴滴运动是由流量空间相关性和滴滴大小之间的相互作用所支配的.
- 证明了从弹道扩散到正常扩散的平均平方位移的过渡,取决于滴滴大小.
结论:
- 这项研究为理解活性流体中的被动物体动力学提供了理论框架.
- 滴滴大小是决定运输行为 (扩散模式) 过渡的关键因素.
- 这些发现提供了对控制复杂活性环境中的粒子运动的时空尺度的洞察.
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