Oscillation of a rotating levitated droplet: Analysis with a mechanical model
Oscillation of a rotating levitated droplet: Analysis with a mechanical model
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DOI：
10.1103/physreve.92.062904
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发表时间：
2015-12-07
影响因子：
2.4
通讯作者：
Abe, Yutaka
中科院分区：
文献类型：
--
作者：
Kitahata, Hiroyuki;Tanaka, Rui;Abe, Yutaka
毫米至厘米尺度的液滴可以表现出静电悬浮，并且这种悬浮液滴可以用于通过观察振荡变形的特征频率来测量液体的表面张力。在本研究中，提出了一个简单的力学模型，考虑一个单一的振荡模式在椭球形变形的悬浮旋转液滴。通过测量相对于旋转速度和振荡幅度的振荡频率，可以预期可以提高表面张力测量的精度。使用所提出的模型，振荡变形的特征频率和平均纵横比的依赖关系计算相对于旋转液滴的旋转角速度。这些依赖关系被发现是与实验观察相一致的。
A droplet of millimeter-to-centimeter scale can exhibit electrostatic levitation, and such levitated droplets can be used for the measurement of the surface tension of the liquids by observing the characteristic frequency of oscillatory deformation. In the present study, a simple mechanical model is proposed by considering a single mode of oscillation in the ellipsoidal deformation of a levitated rotating droplet. By measuring the oscillation frequency with respect to the rotational speed and oscillation amplitude, it is expected that the accuracy of the surface tension measurement could be improved. Using the proposed model, the dependences of the characteristic frequency of oscillatory deformation and the averaged aspect ratio are calculated with respect to the rotational angular velocity of a rotating droplet. These dependences are found to be consistent with the experimental observations.