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相关概念视频

Surface Tension, Capillary Action, and Viscosity02:57

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Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
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Surface Tension of Fluid01:22

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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...
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相关实验视频

Updated: May 31, 2025

High Throughput Analysis of Liquid Droplet Impacts
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滴水冲击稀疏的微的非湿表面.

Longfei Zhang1, Jialong Wu1, Yingfa Lu1

  • 1Department of Mechanics, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, People's Republic of China.

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概括

滴滴可以从微的表面反弹,湿状态取决于表面结构和接触线密度. 冲击速度极限是通过能量障碍和液体透来决定的.

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科学领域:

  • 表面科学是一门科学.
  • 流体动力学 流体动力学
  • 材料科学 是一种材料科学.

背景情况:

  • 微的表面表现出异构性质,影响滴滴的行为.
  • 了解液滴与表面的相互作用对于各种应用至关重要.

研究的目的:

  • 在稀疏的微形聚二甲基 (PDMS) 表面上研究滴水的湿透性,稳定性和冲击动态.
  • 分析表面固体分数对滴滴行为的影响.

主要方法:

  • 实验研究滴滴对微的PDMS表面的碰撞.
  • 使用前进和后退的接触角度分析湿度.
  • 根据接触线密度确定湿度状态 (卡西-巴克斯特与温泽尔).
  • 滴滴反弹动态的实验和理论分析.

主要成果:

  • 由于表面微型图案,观察到异型湿度.
  • 建议基于临界接触线密度的滴水湿状态 (崩/悬浮) 的标准.
  • 滴滴在特定撞击速度范围内以0.158的固体分数反弹到表面.
  • 较低的反弹速度限制与接触角度歇斯底里有关;较高的限制与液体透到空洞有关.

结论:

  • 微挖掘的PDMS表面表现出异型湿性质.
  • 滴滴湿状态取决于表面结构和液体特性之间的相互作用.
  • 滴滴反弹在这些表面上是可能的,在定义的冲击速度限制内,受表面形态和能量动态的影响.