预测一滴水冲击薄膜液体时的喷
S Rajendran1, M A Jog1, R M Manglik1
1Thermal-Fluids and Thermal Processing Laboratory, Department of Mechanical and Materials Engineering, University of Cincinnati, 2901 Woodside Drive, Cincinnati, Ohio 45221-0072, United States.
Langmuir : the ACS journal of surfaces and colloids
|September 27, 2023
概括
这项研究探讨了液滴如何与薄液膜相互作用. 我们使用雷诺兹数 (Re),债券数 (Bo) 和莫顿数 (Mo) 发现了一个新的相关性,以预测一滴水是否喷或沉积.
科学领域:
- 流体动力学 流体动力学
- 表面科学是一门学科.
- 实验物理实验物理学
背景情况:
- 滴滴膜相互作用在各种工业过程中至关重要.
- 了解喷和沉积现象是控制这些过程的关键.
- 现有的模型往往缺乏对各种流体特性进行全面的表征.
研究的目的:
- 为了实验性地研究一滴水对薄薄的停滞液体薄膜的影响的动态.
- 描述液体沉积和喷之间的过渡.
- 为喷/无喷门开发一个预测相关性.
主要方法:
- 利用高速数字成像进行实时,高分辨率捕获滴滴撞击动态.
- 使用五种不同的液体来覆盖广泛的粘度和表面张力.
- 系统地改变掉落直径和冲击速度以探索参数空间.
主要成果:
- 确定了控制滴滴撞击结果的关键无维参数:雷诺兹数 (Re),邦德数 (Bo) 和莫顿数 (Mo).
- 建立了一个新的相关性,Re = φ(Bo,Mo),以预测喷/无喷边界.
- 实验结果与得出的相关性和现有的文献数据有很好的一致性.
结论:
- 喷/无喷值的有效预测是通过涉及惯性,粘性和毛细血管力的相关性.
- 开发的相关性为预测滴滴撞击行为提供了一个强大的工具.
- 这项研究推进了对各种液体性质中滴滴膜相互作用的基本理解.
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