站立式下降以确定退缩的接触角度.
Diego Díaz1, Aman Bhargava2, Franziska Walz3
1Dept. of Engineering Mechanics, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden.
Soft matter
|December 22, 2025
概括
站立式降落技术提供了一种新的,独立于用户的方法来测量退缩的接触角度. 这种方法,与传统的测法不同,使用的液体少,避免了针引起的扭曲,以准确地分析湿行为.
科学领域:
- 表面科学是一门学科.
- 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:
- 湿行为对于自然和工业表面至关重要.
- 前进和后退的接触角度决定了湿.
- 静止滴技术 (度) 是常见的方法,但有局限性.
研究的目的:
- 引入站立下降 (SUD) 技术作为测量回退接触角度的替代方法.
- 解决度的局限性,包括大体积,长时间和用户依赖性.
- 为接触角测量提供更准确和自动化的方法.
主要方法:
- 开发了站立下降 (SUD) 技术,涉及液体喷射沉积和辐射扩散.
- 使用流体体积 (VoF) 模拟来分析SUD技术.
- 在模拟中系统地改变粘度,接触角度和沉积下降体积.
主要成果:
- SUD技术的准平衡状态准确地近似了回退的接触角度.
- 该方法在一系列表面上是有效的,从水友性到疏水性.
- VoF模拟确定了SUD技术何时能产生准确的回落接触角度的标准.
结论:
- 站立式降落技术是一种可行的,不那么依赖于用户的替代方案,用于缩小接触角度测量.
- SUD方法克服了诸如针引起的跌落扭曲等问题.
- 提供了缩放标准,以指导站立下降技术的应用.
相关概念视频
01:13Contact Angle
17.8K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
17.8K
01:17Beams with Unsymmetric Loadings
381
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
381
01:18Rise of Liquid in a Capillary Tube
2.9K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
2.9K