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arXiv 1111.3762physics.flu-dyn
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用高速彩色干涉测量法直接测量撞击液滴下的空气层轮廓

Direct measurements of air layer profiles under impacting droplets using high-speed color interferometry

Roeland C. A. van der Veen, Tuan Tran, Detlef Lohse, Chao Sun

摘要:

撞击在固体表面上的液滴在液体与表面接触之前变形。我们使用高速彩色干涉法直接测量液滴下的空气层轮廓的时间演变,获得润湿过程之前和期间的空气层厚度。基于在多个时间获得的提取的配置文件的时间演化,我们测量的速度离开液体和固体之间的间隙,并占润湿机制和气泡截留。本工作提供了一个工具,以准确地测量空气层的轮廓和定量研究的冲击动力学在短时间尺度前的影响。

英文摘要:

A drop impacting on a solid surface deforms before the liquid makes contact with the surface. We directly measure the time evolution of the air layer profile under the droplet using high-speed color interferometry, obtaining the air layer thickness before and during the wetting process. Based on the time evolution of the extracted profiles obtained at multiple times, we measure the velocity of air exiting from the gap between the liquid and the solid, and account for the wetting mechanism and bubble entrapment. The present work offers a tool to accurately measure the air layer profile and quantitatively study the impact dynamics at a short time scale before impact.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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