在柔软的基板上模拟液滴.
Yalda Poorhoshyar1, Amir H Fatollahi2, Amir Aghamohammadi1
1Department of Fundamental Physics, Faculty of Physics, Alzahra University, Tehran, 1993891167, Iran.
The European physical journal. E, Soft matter
|January 21, 2025
概括
这项研究用数值模拟了在软基板上的液滴,使用能量的最小化. 结果显示,接触点附近的接触引力非零,挑战了软材料现有的弹性假设.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
背景情况:
- 了解液体-基板相互作用对于各种应用至关重要.
- 软基板的建模具有独特的挑战,因为它们的可变形性.
- 现有的分析模型通常依赖于简化可能不成立的假设.
研究的目的:
- 通过使用能量最小化方法在弹性基板上数值模拟液滴.
- 研究材料特性和几何学对湿现象的影响.
- 分析假设的有效性,如弹性的零接触力引.
主要方法:
- 一个由质弹组成的立方格子模拟了弹性基板.
- 界面能量术语解释了固体-液体-蒸汽相互作用.
- 在恒定体积约束下的数值最小化过程确定了系统配置文件.
主要成果:
- 模拟准确地预测了基板和落下形状,产生了接触角度和有效的表面张力.
- 观察到与分析解决方案的一致性,但在较高的模量或较低的波松比率时会出现偏差.
- 确定了接触点附近的非零接触引力,这与没有接触引力的假设相矛盾.
结论:
- 数字模拟为研究软基板上的液体-固体相互作用提供了强大的工具.
- 假设零接触引力不是普遍有效的,尤其是在接触点附近.
- 有效的表面张力与不可压缩基板的扬模量线性增加.
相关概念视频
01:22Surface Tension of Fluid
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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...
Surface tension varies...
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The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
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