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两个液体接口在裂微通道内的电动效应

Chengfa Wang¹, Qi Gao¹, Yongxin Song¹

¹Department of Marine Engineering, Dalian Maritime University, Dalian 116026, China.

Langmuir : the ACS journal of surfaces and colloids

|November 17, 2023

概括

在微通道中的两液体接口的电动速度取决于表面电荷和液体高度. 接口运动方向是由zeta-potentials决定的,影响了污染物分离应用.

科学领域:

流体动力学流体动力学
电化学电化学电化学
微流体学微流体学

背景情况:

电动力学现象对于微流体应用至关重要.
了解电场下的流体接口行为对于先进的分离技术至关重要.

研究的目的:

在裂微通道中的两液体接口上研究电动效应.
分析表面泽塔电位和液相高度对接口速度的影响.
确定控制界面运动方向和大小的因素.

主要方法:

开发了一个三维 (3D) 数值模型.
在不混合的液-水溶液界面上模拟电动流.
不同的表面泽塔电位,液相高度,粘度比率和电场强度.

主要成果:

接口的运动方向由接口和微通道壁的相对泽塔电位决定.
接口速度随着水相高度和粘度比率的增加而降低.
接口速度随着不混合液相高度和直流电场强度的增加而增加.

结论:

这项研究阐明了微通道中的两个液体接口的复杂电动行为.
研究结果为优化微流体设备的操作和分离颗粒污染物提供了洞察力.

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