使用从液体中动态提取的两个纤维测量毛细管力:证据表明增强的Cheerios效应
Hadrien Bense1, Emmanuel Siéfert1, Fabian Brau1
1Université libre de Bruxelles (ULB), Nonlinear Physical Chemistry Unit, CP 231, 1050 Bruxelles, Belgium.
Physical review letters
|November 17, 2023
概括
纤维收缩速度显著放大了毛细血管的吸引力. 这项研究揭示了动态半径形状是理解这些增强相互作用的关键,对各种应用有影响.
科学领域:
- 流体动力学 流体动力学
- 接口现象 接口现象
- 表面科学是一门科学.
背景情况:
- 毛细管力在液体-固体相互作用中至关重要.
- 了解动态毛细管力对于涉及流体吸收的过程至关重要.
- 现有的理论,如兰道-莱维希-德贾古因并不能完全捕捉到动态阴茎行为.
研究的目的:
- 实验测量和分析在动态抽取过程中两个纤维之间的毛细血管吸引力.
- 为了研究收缩速度对毛细血管力大小的影响.
- 开发基于半径形状的动态毛细血管力理论模型.
主要方法:
- 在纤维收缩过程中测量毛细血管吸引力的实验设置.
- 光学观测和数值模拟以描述动态半径.
- 对单纤维和双纤维周围的空气液体接口变形的分析.
主要成果:
- 与静态条件相比,毛细管的吸引力随着收缩速度增加了多达十倍.
- 经典理论无法预测的动态半径形状驱动了这种增强力.
- 一个线性叠加原理准确地描述了围绕两个纤维的接口.
- 对毛细血管力的一种分析表达式与实验数据有很好的一致性.
结论:
- 收缩速度极大地影响纤维之间的毛细血管相互作用.
- 动态的半径形状是毛细血管力增加的主要因素.
- 这些发现为毛细血管现象提供了新的理解,并具有潜在的工业和生物应用.
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