Electrohydrodynamic surface microvortices for mixing and particle trapping

被引：46

作者：

Yeo, Leslie Y. ^{[1
]}

Hou, Diana

Maheshswari, Siddharth

Chang, Hsueh-Chia

机构：

[1] Monash Univ, Dept Mech Engn, Micro Nanophys Res Lab, Clayton, Vic 3800, Australia

[2] Univ Notre Dame, Dept Chem & Biomol Engn, Ctr Microfluid & Med Diagnost, Notre Dame, IN 46556 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 23期

关键词：

D O I：

10.1063/1.2212275

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a free-surface electrohydrodynamic flow phenomenon driven by an ionic wind mechanism induced by a high frequency gas-phase ac field (> 10 kHz). Intense vortices > 1 cm/s are generated above a critical voltage, beyond which the vortices break down to spawn off new vortex pairs leading to a cascade of vortices over a continuum of length scales; the mixing efficiency approaches a turbulent-like state. Colloidal particles are attracted and aggregated into planar crystal structures within the vortices by a combination of dielectrophoresis and shear-induced diffusion. (c) 2006 American Institute of Physics.

引用

页数：3

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