Effect of travelling wave electric field on fine particles motion on an electrodynamic board
Effect of travelling wave electric field on fine particles motion on an electrodynamic board
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行波电场对电动板上细颗粒运动的影响
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
L. Dascalescu
中科院分区：
文献类型：
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作者：
A. Zouaghi;N. Zouzou;L. Dascalescu
本文的目的是研究细介电粒子在具有交错电极的电动力板上的运动。这项工作由两部分组成。在第一部分中，利用实验装置研究了粒子的运动轨迹。高速摄像机记录粒子在EDB表面运动的视频，作为不同参数的函数，如施加电压信号的频率和相位。频率范围为10 ~ 500hz。所研究的PMMA颗粒尺寸在50 ~ 100 μm之间。在本工作的第二部分，我们利用有限元软件对电场和静电力的分布进行了数值模拟。结果表明，颗粒运动高度依赖于频率，并且三相结构对表面清洁应用更有效。库仑力在电极上和间隙中起主导作用。介电泳（DEP）力在电极边缘附近占主导地位。行波介电泳（twDEP）力相对较弱，但它们也会产生显著的影响。
The aim of this paper is to investigate the motion of fine dielectric particles on an electrodynamic board (EDB) with interdigitated electrodes. This work is composed of two parts. In the first part, the trajectories of the particles are studied using an experimental setup. A high speed camera records videos of particles motion above the EDB surface, as a function of different parameters, such as the frequency and the phase of the applied voltage signals. The frequency range extends from 10 to 500 Hz. The size of PMMA particles under investigation ranges between 50 and 100 μm. In the second part of this work, we numerically model and simulate the electric field and the electrostatic forces distribution, using finite element method (FEM) commercial software. The results reveal that the particles motion highly depends on the frequency and that the three-phase configuration is more efficient for surface cleaning applications. Coulomb force is dominant on the electrodes and in the gap. Dielectrophoretic (DEP) force is dominant near the electrodes edges. The travelling wave dielectrophoretic (twDEP) force is relatively weak but they can also have a significant effect.