1. 温州大学机电工程学院
2. 河北工业大学机械工程学院
3. 丹东百特仪器有限公司
纸质出版:2024
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李江涛, 张祥雷, 孙健, 等. U型毛细管电极电渗流数值模拟研究[J]. 传感器与微系统, 2024,(2):29-32.
李江涛, 张祥雷, 孙健, 等. U型毛细管电极电渗流数值模拟研究[J]. 传感器与微系统, 2024,(2):29-32. DOI: 10.13873/J.1000-9787(2024)02-0029-04.
为研究U型毛细管电极内电渗流(EOF)对微纳米颗粒表面Zeta电位测量结果的影响,以U型毛细管电极为基础,通过数值仿真分析了毛细管电极内部EOF启动机制及高频交变电压对其抑制机理。结果表明,当毛细管电极施加直流电压,壁面EOF在管壁面压力梯度作用下产生回流,启动时间为毫秒(ms)级别。当施加高频交变电压时,高频率交变电场阻碍了EOF的启动,在壁面处产生局部振荡流。随着频率的增加,毛细管EOF受到抑制作用更为强烈。相比其他波形,三角波电压对EOF具备较好的抑制作用,局部振荡流的幅度范围更小。研究对颗粒Zeta电位检测和微流控电动流动的精准控制具有借鉴意义。
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