Mixing Mechanism of Microfluidic Mixer with Staggered Virtual Electrode Based on Light-Actuated AC Electroosmosis
| Autor: | Hanghang Ding, Liuyong Shi, Teng Zhou, Binfeng Yin, Zhong Xiangtao, Zhenyu Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Field (physics) Microfluidics Micromixer 02 engineering and technology 01 natural sciences Article Physics::Fluid Dynamics Electric field microfluidic mixer TJ1-1570 Mechanical engineering and machinery Electrical and Electronic Engineering Mixing (physics) Laplace's equation Microchannel electrokinetics Mechanical Engineering 010401 analytical chemistry Mechanics 021001 nanoscience & nanotechnology computational fluid dynamics (CFD) 0104 chemical sciences Vortex Computer Science::Other optical virtual electrode light-actuated AC electroosmosis (LACE) Control and Systems Engineering 0210 nano-technology |
| Zdroj: | Micromachines Micromachines, Vol 12, Iss 744, p 744 (2021) Volume 12 Issue 7 |
| ISSN: | 2072-666X |
| Popis: | In this paper, we present a novel microfluidic mixer with staggered virtual electrode based on light-actuated AC electroosmosis (LACE). We solve the coupled system of the flow field described by Navier–Stokes equations, the described electric field by a Laplace equation, and the concentration field described by a convection–diffusion equation via a finite-element method (FEM). Moreover, we study the distribution of the flow, electric, and concentration fields in the microchannel, and reveal the generating mechanism of the rotating vortex on the cross-section of the microchannel and the mixing mechanism of the fluid sample. We also explore the influence of several key geometric parameters such as the length, width, and spacing of the virtual electrode, and the height of the microchannel on mixing performance the relatively optimal mixer structure is thus obtained. The current micromixer provides a favorable fluid-mixing method based on an optical virtual electrode, and could promote the comprehensive integration of functions in modern microfluidic-analysis systems. |
| Databáze: | OpenAIRE |
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