Electrohydrodynamic Particle Aggregation on an Electrode Driven by an Alternating Electric Field Normal to It
Electrohydrodynamic Particle Aggregation on an Electrode Driven by an Alternating Electric Field Normal to It
复制标题
由垂直于电极的交变电场驱动的电极上的电流体动力粒子聚集
作者：
P. Sides
本文描述了电极附近电介质球附近电解液电流体流动速度的近似模型。该模型考虑了当交流电通过电极附近的扩散层时，由球的存在引起的横向电场与扩散层中产生的自由电荷的相互作用。基于该模型的方程预测，在二元电解液的情况下，相邻的介电粒子聚集或分离取决于单个离子电导率的相对大小和振荡频率。如果阴离子发生反应，其电导超过阳离子电导，则两个粒子相互排斥；反之，则粒子聚集。该方程还预测，分离或聚集取决于电流的振荡频率。该模型解释了在文献中观察到的频率和颗粒大小的影响。最后，一个无量纲的群，它放置了一个co.
An approximate model for the velocity due to electrohydrodynamic flow of electrolyte in the vicinity of a dielectric sphere near an electrode is described. The model considers the interaction of a lateral electric field, caused by the presence of the sphere, with free charge produced in the diffusion layer near an electrode when alternating current is passed through it. An equation based on the model predicts that adjacent dielectric particles aggregate or separate depending on the relative magnitude of the individual ionic conductivities and the frequency of oscillation in the case of a binary electrolyte. If the anion reacts and its conductance exceeds the cation conductance, the particles repel each other; the particles aggregate if the reverse is true. The equation also predicts that separation or aggregation depends on frequency of oscillation of the current. The model accounts for observed effects of frequency and particle size found in the literature. Finally, a dimensionless group that places a co...