Induced-charge electro-osmotic flow around cylinders with various orientations
Induced-charge electro-osmotic flow around cylinders with various orientations
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DOI：
10.1177/0954406216656886
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发表时间：
2017-11-01
影响因子：
2
通讯作者：
Canpolat, Cetin
中科院分区：
文献类型：
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作者：
Canpolat, Cetin
利用微粒子图像测速技术和数值模拟技术，研究了不同交流电场作用下多根镀金不锈钢棒周围的感应电荷电渗透过程。本文给出了两个完全相同的导电柱的感应双电层与周围流体相互作用的结果。诱导荷电渗流绕多根接触圆柱体直径间隙的圆柱体，呈现出四个旋涡的四极流动结构。诱导荷电渗流的结构和速度大小还取决于柱体的几何形状和取向。结果表明，对于有间隙的多根圆柱体，在圆柱体表面的封闭区域内形成了四个小涡，而其他四个大涡围绕在圆柱面附近。在柱面闭合区域内，涡量分布也强烈依赖于柱面的方位。
Induced-charge electro-osmosis around multiple gold-coated stainless steel rods under various AC electric fields is investigated using the techniques of microparticle image velocimetry and numerical simulation. In this study, the results of interactions between induced electric double layers of two identical conductive cylinders on surrounding fluid are presented. The induced-charge electro-osmosis flow around multiple rods in touch and with one cylinder diameter gap reveals quadrupolar flow structures with four vortices. The induced-charge electro-osmotic flow structure and velocity magnitude also depend on the cylinder geometry and orientation. It is seen that four small vortices develop in the close region of cylinder surface for multiple rods with gap, while the other four large vortices are surrounding them. The distributions of vorticity patterns also strongly depend on cylinder orientation in the close region of cylinder surface.