球体与二元流体之间的毛细管相互作用的粗粒度MD模拟,带有截断的莱纳德-斯潜力
Falk Wüstemann1, Paul Zech1, Robert Magerle1
1Fakultät für Naturwissenschaften, Technische Universität Chemnitz, Chemnitz 09107, Germany.
The journal of physical chemistry. B
|October 28, 2024
概括
这项研究模拟了原子力显微镜 (AFM) 实验中的毛细管力. 计算模型揭示了抗粒子和切断半径如何影响毛细管与复杂流体的相互作用.
科学领域:
- 计算物理学的计算物理.
- 软物质物理学 软物质物理学
- 表面科学是一门科学.
背景情况:
- 原子力显微镜 (AFM) 对流体样本的实验受到毛细血管力的影响,原因是尖端和流体之间形成了桥梁.
- 了解这些毛细管相互作用对于准确的力测量和解释复杂流体系统中的实验数据至关重要.
研究的目的:
- 开发和介绍一个计算模型来模拟固体球和粗粒列纳德-斯流体之间的毛细管相互作用.
- 研究抗粒子和潜在切断半径对毛细血管力及其温度依赖性的影响.
主要方法:
- 使用粗粒度的莱纳德-斯流体和添加的防颗粒开发了一个计算模型.
- 毛细管力是通过测量球体在陷潜力中的移位来计算的,因为它接近并从流体中收回.
- 该方法产生与AFM实验结果类似的力-距离数据.
主要成果:
- 该研究成功模拟了毛细管力,产生了与AFM数据可比的力距离曲线.
- 量化了切断的莱纳德-斯电位的切断半径对毛细血管力的影响.
- 发现毛细血管力的温度依赖与系统的临界温度相匹配.
结论:
- 提出的计算方法为研究各种复杂流体中的尖端样本相互作用提供了一个强大的方法.
- 该模型允许在毛细管力研究中调查各种粒子形状和力探测方案.
- 这项工作提供了关于AFM和相关技术中毛细血管现象的基本物理学的见解.
更多相关视频
11:03An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
8.5K
07:31Author Spotlight: Advancing Cell Membrane Biophysics - Exploring Interactions and Challenges Through Experimental and Computational Approaches
Published on: September 1, 2023
2.1K
相关概念视频
Capillarity in Fluid
151
Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
151
Surface Tension of Fluid
243
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
Surface tension varies...
243
