沟气溶:从水下气泡碰撞中产生的产量下降
Xinghua Jiang1, Lucas Rotily2, Emmanuel Villermaux2,3
1Department of Environmental Science and Engineering, Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, <a href="https://ror.org/013q1eq08">Fudan University</a>, Shanghai 200433, China.
Physical review letters
|July 29, 2024
概括
以前认为从表面泡破裂中形成的亚微米滴,主要是在水下产生. 这是由于碰撞泡造成的薄膜不稳定性造成的,从根本上改变了对气溶生产的理解.
科学领域:
- 流体动力学 流体动力学
- 气溶科学是一门气溶科学.
- 接口科学 接口科学
背景情况:
- 泡破裂是已知的产生空气中的颗粒的机制.
- 现有的模型专注于表面现象,如薄膜破裂和喷射瓦解.
研究的目的:
- 为了调查归因于表面泡破裂的亚微米滴的起源.
- 确定在水生环境中产生细气溶的替代机制.
主要方法:
- 在水下对气泡动态的实验观测.
- 在气泡-气泡碰撞期间分析薄膜不稳定性.
主要成果:
- 显著的一小部分亚微米滴在到达表面之前在泡内部产生.
- 在碰撞的气泡之间挤压的薄膜的动不稳定性被确定为主要来源.
- 泡泡碰撞在这种水下下降形成中起着至关重要的作用.
结论:
- 产生许多亚微米滴的主要机制是在水下,而不是在表面.
- 气泡-气泡碰撞是细气溶生产的一个关键因素.
- 这一发现需要对空气-海相互作用和气溶传输进行重新理解.
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