The phenomenon of Marangoni chaotic electroconvection of electrolytes induced by liquid metal droplets has been serving as a method of choice for pumping of microfluidics in the past ten years. Although an external additional alternating voltage, usually being sufficiently small, was invariably employed in practical experiments for stabilizing the unidirectional liquid motion caused by a preexisted direct-current electric field, its subtle effect on the superimposed non-uniform surface tension and the final fluid transport state is still theoretically unclear. From the physical perspective of induced-charge electrokinetics, we present herein an analytical criteria for the conditions under which a sessile metal drop can actuate unidirectional liquid motion passing across it affected by a biased alternating voltage signal, wherein a mechanical balance between the linear pump pressure and nonlinear bipolar stress components exerted on the conducting drop surface has been taken into...

中文翻译：

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偏置交变电场中液态金属液滴驱动的电毛细管流动：从感应电荷电动学角度的理论分析

在过去的十年中，液态金属液滴引起的电解质的Marangoni混沌电对流现象已成为泵送微流体的一种选择方法。尽管通常在实际实验中总是采用外部附加交流电压（通常足够小）来稳定由预先存在的直流电场引起的单向液体运动，但其对叠加的非均匀表面张力和最终流体传输的微妙影响理论上尚不清楚状态。从感应电荷电动学的物理角度来看，我们在这里为固着金属液滴可在受到偏置交流电压信号影响的情况下激活穿过其的单向液体运动的条件下提供一个分析标准，