Electrokinetic flow and energy conversion in a curved microtube

作     者：Zhaodong DING Kai TIAN Yongjun JIAN Zhaodong DING;Kai TIAN;Yongjun JIAN

作者机构：School of Mathematical ScienceInner Mongolia UniversityHohhot010021China 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2022年第43卷第8期

页      面：1289-1306页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(Nos.11902165 and 11772162) the Natural Science Foundation of Inner Mongolia Autonomous Region of China(No.2019BS01004) the Inner Mongolia Grassland Talent of China(No.12000-12102408) 

主　　题：electrokinetic flow streaming potential electrokinetic energy conversion(EKEC) perturbation analysis method curved microchannel 

摘      要：Curved channels are ubiquitous in microfluidic *** pressure-driven electrokinetic flow and energy conversion in a curved microtube are investigated analytically by using a perturbation analysis method under the assumptions of the small curvature ratio and the Reynolds *** results indicate that the curvature of the microtube leads to a skewed pattern in the distribution of the electrical double layer(EDL)*** EDL potential at the outer side of the bend is larger than that at the inner side of the *** curvature shows an inhibitory effect on the magnitude of the streaming potential field induced by the pressure-driven *** the spanwise pressure gradient is dominant over the inertial force,the resulting axial velocity profile is skewed into the inner region of the curved ***,the flow rate in a curved microtube could be larger than that in a straight one with the same pressure gradient and shape of cross *** asymptotic solutions of the axial velocity and flow rate in the absence of the electrokinetic effect are in agreement with the classical results for low Reynolds number ***,the curved geometry could be beneficial to improving the electrokinetic energy conversion(EKEC)efficiency.