Accurate determination of volume and evaporation rate of micron-size liquid particle
Accurate determination of volume and evaporation rate of micron-size liquid particle
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DOI：
10.1063/1.3483250
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发表时间：
2010-09
影响因子：
3.2
通讯作者：
Taro Yamada;N. Sasagawa;K. Sakai
中科院分区：
文献类型：
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作者：
Taro Yamada;N. Sasagawa;K. Sakai
本文提出了一种非接触式测量液滴尺寸的方法，该方法可测量直径约为10 μm的液滴，测量精度可达0.1 μm。由喷墨喷嘴喷射的液滴被引入玻璃挡风玻璃中，并且由于重力对抗大气的粘度而福尔斯下落。液滴由沿着玻璃挡风玻璃的中心沿着通过的激光照射，并且液滴直径通过具有关于液滴密度和大气粘度的知识的视频分析从下降速度确定。因此，通过快速蒸发过程的液滴尺寸的真实的时间测量成为可能。实验结果表明，用该方法测定的纯水滴蒸发速率比宏观尺度下的表面蒸发速率大200倍以上。
We developed a noncontact method to measure the liquid droplet size of about 10 μm diameter within accuracy of 0.1 μm. A droplet ejected by an inkjet nozzle is induced into the glass windshield and falls due to the gravity against the viscosity of the atmosphere. The droplet is illuminated by a laser passing along the center of the glass windshield and the droplet diameter is determined from the falling velocity by the video analysis with the knowledge about the density of the droplet, and the viscosity of the atmosphere. The real time measurement of the droplet size through the rapid evaporation process thus becomes possible. The evaporation rate from the pure water droplet determined by the present method was found be more than 200 times larger than that from the surface with macroscopic spatial scale.