带有表面活性剂的水滴的碰撞:从分子动力学模拟的洞察力
Soheil Arbabi1,2, Piotr Deuar1, Rachid Bennacer3
1Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland. arbabi@ifpan.edu.pl.
Soft matter
|July 23, 2025
概括
与纯水相比,装有表面活性剂的滴滴碰撞显示出不同的动态,在线性和电力法制度之间过渡更快. 较高的速度有利于线性动力学,影响结合,分离和散裂等结果.
科学领域:
- 流体动力学 流体动力学
- 接口现象 接口现象
- 计算物理学的计算物理.
背景情况:
- 滴滴碰撞在各种自然和工业过程中是至关重要的.
- 了解表面活性剂对液滴碰撞动态的影响对于乳化和喷雾技术等应用至关重要.
研究的目的:
- 为了研究和比较装有表面活性剂的水滴与纯水滴的碰撞动态.
- 分析桥梁增长速度,能量平衡和圆盘动态在正面和离中心碰撞.
- 为了区分碰撞的结果,如凝聚,分离和喷.
主要方法:
- 使用粗粒度模型进行分子动力学模拟.
- 对桥梁增长扩展制度 (线性和电力法) 的分析.
- 滴滴类型之间的能量消耗和磁盘结构形成的比较.
主要成果:
- 碰撞动力学表现出初始的线性缩放,其次是功率定律动力学,与纯滴滴凝聚不同.
- 装有表面活性剂的滴滴在这些动态模式之间呈现出更快的转变.
- 较高的碰撞速度导致线性动力学的主导地位,而增加的速度和偏移增强了分离和飞.
- 纯水滴产生更多的卫星滴,这是由于较低的粘性阻尼.
结论:
- 表面活性剂显著改变滴滴碰撞动态,影响调节过渡和结果.
- 碰撞速度和冲击参数是决定最终状态 (凝结,分离,喷) 的关键因素.
- 充满表面活性剂的液滴中能量消散率更高,导致盘结构不那么明显.
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