Asymmetric rectified electric fields generate flows that can dominate induced-charge electrokinetics
Asymmetric rectified electric fields generate flows that can dominate induced-charge electrokinetics
复制标题
DOI：
10.1103/physrevfluids.5.013702
复制
发表时间：
2020-01-08
影响因子：
2.7
通讯作者：
Ristenpart, William D.
中科院分区：
文献类型：
--
作者：
Amrei, S. M. H. Hashemi;Miller, Gregory H.;Ristenpart, William D.
我们推导出一个广义感应电荷电动（ICEK）的速度周围的导电物体放置在一个任意的多模态电场。广义模型允许考虑不对称整流电场（AREF），这是最近建立的发生在液体中的离子具有不等的迁移率。包括AREF产生流体速度，其中方向和幅度都敏感地取决于所施加的电势、频率、离子类型和强度，甚至平行电极之间的对象的确切位置。这些结果为ICEK系统中观察到的长期存在的流动逆转问题提供了解释。
We derive a generalized induced-charge electrokinetic (ICEK) velocity around a conducting object placed in an arbitrary multimodal electric field. The generalized model allows consideration of asymmetric rectified electric fields (AREFs), which have recently been established to occur in liquids where the ions present have unequal mobilities. Including the AREF yields fluid velocities in which both the direction and the magnitude depend sensitively on the applied potential, frequency, ionic type and strength, and even the exact placement of the object between parallel electrodes. The results provide an explanation for the long-standing question of flow reversals observed in ICEK systems.