滴滴撞击在具有的超疏水型圆柱形表面上的接触时间
Xu Chen1,2, Yi-Feng Wang1,2, Yan-Ru Yang1,2
1State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China.
Langmuir : the ACS journal of surfaces and colloids
|December 5, 2023
概括
在超疏水气中添加亚齐图斯山脊可以缩短高韦伯数 (We) 滴滴接触时间. 这种由惯力和膜破裂驱动的效应,为抗结冰应用提供了潜力.
科学领域:
- 流体动力学 流体动力学
- 表面科学是一门科学.
- 材料科学是一种材料科学.
背景情况:
- 在平坦的超疏水表面上的山脊可以减少滴水接触时间.
- 超水表面表现出反水性质.
- 滴水冲击动态对于各种应用至关重要.
研究的目的:
- 调查是否在超疏水型气上的亚齐图斯可以减少与状平面或无状圆柱形表面相比的滴滴接触时间.
- 在不同的韦伯数 (We) 和无维滴径 (D*) 下分析滴水冲击动态和接触时间特征.
- 确定在状圆柱形表面实现缩短接触时间的条件和标准.
主要方法:
- 实验研究滴滴对具有亚齐木斯山脊的超疏水型圆柱形表面的影响.
- 韦伯数 (We) 和无维滴径 (D*) 的系统变化.
- 分析滴水的行为,包括接触时间,膜破裂和滴水分裂.
主要成果:
- 在超低,低和中等韦伯数下,接触时间比在状平面上更长.
- 在高韦伯数范围中,增加的惯性力导致山脊上方的液体薄膜破裂 (雷利高原不稳定),导致滴滴分裂,反弹和反弹.
- 引入了一个标准C = We/D*;当C > 2.42时,接触时间比状平面或圆柱形表面要短,并且随着We的增加或D*的减少而减少.
结论:
- 超水气上的亚齐穆斯山脊可以在特定的高韦伯数条件下显著减少滴水接触时间.
- 观察到的现象,以薄膜破裂和滴滴分裂为特征,与标准C = We/D* > 2.42有关.
- 这些发现表明,由于增强的滴滴散射和减少接触时间,在抗结冰技术中具有潜在的应用.
相关概念视频
01:13Contact Angle
12.4K
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...
12.4K
02:57Surface Tension, Capillary Action, and Viscosity
27.9K
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...
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...
27.9K
01:22Surface Tension of Fluid
304
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...
304