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Topology optimization of electrode patterns for electroosmotic micromixer

机译：电渗微混合器电极图案的拓扑优化

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摘要

In confined microfluidic spaces such as microchannels, electroosmosis is a convenient Coulomb-force mechanism used to electrically actuate charged particles and ions presented in the fluid and pump the electrolytic fluid itself through drag forces. The shape and position of electrode pairs, whose induced charges are in contact with the fluid, determine the electric field and hence the resulting fluid-dynamic velocity distribution. In this paper, we address the inverse design of the electrode-pair patterns in such actuation mechanisms. Our approach is to use topology optimization to inversely determine the patterns of an electrode pair. The optimization procedure requires a mathematical description of the desired fluid behaviour, and then drives the patterns of the electrode pairs to achieve the goal performance. We demonstrate the behaviour of the procedure, which couples the Navier-Stokes equations with charge transportation, to implement an efficient electroosmotic micromixer for laminar microflow. We show that the procedure allows to investigate such microflows under the influence of selected parameter variations, thereby exploring the design space towards optimal device performance. This developed method is novel on the topology optimization of a surface structure to control bulk performance and its implementation over a lower-dimensional surface of an otherwise volumetric domain, where the material interpolation is implemented between Dirichlet and Newmann types of boundary conditions. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在有限的微流体空间（例如微通道）中，电渗是一种方便的库仑力机制，用于电驱动流体中存在的带电粒子和离子，并通过拖曳力泵送电解流体本身。感应电荷与流体接触的电极对的形状和位置决定了电场，因此决定了流体动力学速度分布。在本文中，我们解决了这种致动机构中电极对图案的逆向设计。我们的方法是使用拓扑优化来反向确定电极对的图案。优化过程需要对所需流体行为进行数学描述，然后驱动电极对的模式以实现目标性能。我们演示了该程序的行为，该程序将Navier-Stokes方程与电荷传输耦合在一起，以实现用于层流微流的高效电渗微混合器。我们表明，该程序允许在所选参数变化的影响下研究此类微流，从而探索朝向最佳器件性能的设计空间。这种开发的方法在控制表面结构的拓扑优化以控制整体性能方面是新颖的，并且可以在体积域的低维表面上实现，该方法在Dirichlet和Newmann类型的边界条件之间实现了材料插值。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2018年第ptab期|1299-1315|共17页
  • 作者

    Deng Yongbo; Zhou Teng; Liu Zhenyu; Wu Yihui; Qian Shizhi; Korvink Jan G.;

  • 作者单位

    Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys CIOMP, State Key Lab Appl Opt, Changchun 130033, Jilin, Peoples R China;

    Hainan Univ, Mech & Elect Engn Coll, Haikou 570228, Hainan, Peoples R China;

    Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys CIOMP, Changchun 130033, Jilin, Peoples R China;

    Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys CIOMP, State Key Lab Appl Opt, Changchun 130033, Jilin, Peoples R China;

    Old Dominion Univ, Dept Mech & Aerosp Engn, ECSB 1309,4700 Elkhorn Ave, Norfolk, VA 23529 USA;

    KIT, Inst Microstruct Technol, Hermann von Helmholtzpl 1, D-76344 Eggenstein Leopoldshafen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Topology optimization; Electroosmosis; Electrode; Micromixer;

    机译：拓扑优化;电渗;电极;微混合器;

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