模拟二进制液滴碰撞,从反弹到破碎的模式
Mohammad Fahim Faisal Patwary1, Doruk Isik1, Song-Charng Kong1
1Texas Tech University, Department of Mechanical Engineering, Lubbock, Texas 79409, USA.
Physical review. E
|November 18, 2025
概括
本研究介绍了一种统一的光滑粒子水力学 (SPH) 模拟,用于模拟各种韦伯数 (We) 的滴滴碰撞结果. 这种方法准确地捕捉了不同流体的反弹,凝聚,分离和破碎模式.
科学领域:
- 流体动力学 流体动力学
- 多相流程 多相流程
- 计算物理 计算物理
背景情况:
- 二进制滴滴碰撞具有不同的结果,如反弹,凝聚和破碎,高度依赖韦伯数 (We).
- 现有的数值模型往往侧重于特定的模式,并且缺乏整个影响参数空间的统一方法.
- 了解这些碰撞动态对于燃烧,喷雾和微流体应用至关重要.
研究的目的:
- 开发一种集成模拟方法,能够捕获所有主要的二进制液滴碰撞模式.
- 通过使用单一的数值框架,在广泛的韦伯数范围 (We=10-1000) 上研究滴滴碰撞结果.
- 为滴滴碰撞结果提供一个全面的系统地图.
主要方法:
- 利用光滑粒子水力学 (SPH),一种无网格的方法,用于模拟滴滴碰撞.
- 结合了基于界面曲率的方法来建模反弹状态和碳化合物行为.
- 对各种流体 (水,四度甘,六度甘) 和碰撞类型 (正面,偏离中心) 的实验数据进行了验证的模拟.
主要成果:
- 该SPH方法成功地复制了反弹,凝聚,拉伸分离和破碎的模式.
- 在拉伸分离中准确预测变形形态和卫星液滴形成.
- 对正面碰撞的实验数据 (We=200-1500) 进行了验证,并扩展到离中心的情况.
- 创建了一个全面的政权图,说明了从We=0到1000的碰撞结果.
结论:
- 提出的综合SPH方法提供了一个统一的框架来模拟各种二进制滴水碰撞结果.
- 该模型准确地捕捉了广泛的韦伯数和冲击参数的复杂现象.
- 这项工作为预测和理解各种科学和工程领域的滴滴碰撞动态提供了有价值的工具.
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