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在落冲击下,微气泡在薄液体薄膜上入

H Tran¹, Z He², M Y Pack¹

¹Department of Mechanical Engineering, Baylor University, One Bear Place #97356, Waco, 76798, TX, United States.

Journal of colloid and interface science

|December 10, 2024

概括

液体薄膜的冲击滴产生辐射微气泡列车,称为大面积微气泡 (LAM). 这种现象是由空气隙和接触线不稳定性驱动的,导致微泡覆盖.

科学领域:

流体动力学流体动力学
微流体学微流体学
表面科学是一门科学.

背景情况:

了解滴膜相互作用在各种工业过程中至关重要.
微泡的形成和薄膜中的行为尚未完全理解.

研究的目的:

调查微泡列车的形成和特征,这些微泡列车是由落对薄液体薄膜的冲击产生的.
确定驱动微泡引入和覆盖的关键物理机制.

主要方法:

使用高速成像来量化微气泡列车 (大面积微气泡,LAM) 在薄粘性油膜中.
系统地改变掉落冲击速度和表面倾斜度.
分析掉落惯性,粘性毛细管动力学和流体不稳定性的影响.

主要成果:

辐射微气泡列车 (LAM) 在一个与扩散阶段最大表面覆盖面相当的区域形成.
微气泡的引入取决于湿动态和空气间隙的存在.
空气管的雷利不稳定导致辐射和亚齐图斯微气泡覆盖.

结论:

在薄液体薄膜上的滴落冲击可以产生广泛的微气泡模式 (LAM).
LAM的形成是由空隙动态和接触线不稳定性决定的.
湿现象对于启动和维持微泡的携带至关重要.

关键词:

跌落撞击影响跌落影响倾斜的表面倾斜的表面微气泡是一种微气泡.薄膜的不稳定性薄膜的不稳定性湿湿湿湿是一种

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