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相关概念视频

Excess Pressure Inside a Drop and a Bubble01:13

Excess Pressure Inside a Drop and a Bubble

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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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相关实验视频

Updated: Jun 5, 2025

Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
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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
PubMed
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.

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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相关实验视频

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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.