摘要
为了研究行波电渗(TWEO)微流体驱动,在封闭的微通道内建立了TWEO微流体驱动模型,并进行了仿真和实验研究。根据TWEO驱动原理,分别建立了封闭通道内TWEO微流体驱动电场及流场的数学模型,并对电场及流场问题进行了求解,流场的仿真结果说明了实验测量通道高度2/3处速度的合理性。最后,分析了实验和仿真结果并确定了容抗比例系数。实验及仿真结果表明:电导率分别为1.5 mS/m7、.7 mS/m1、6.9 S/m的KCl溶液的容抗比例系数分别为0.05、0.035、0.025,而且电导率与容抗比例系数呈线性关系。结果为进一步研究TWEO及其应用提供了理论基础及实验方法。
To explore Traveling Wave Electroosmotic （TWEO） pumping microflow, a TWEO pumping model is established in a closed microchannel, and simulation and experiments are presented. Based on the TWEO driving mechanism, the mathematic models of an electric field and a flow field in the closed microchannel are established respectively to solve the electric field and flow field problems. From the flow field simulation results, the measuring velocity on 2/3 of the microchannel height in experiments is proved to be reasonable, The experiment and simulation are undertaken to determine the capacitance impedance coefficients. The results show that for KCl solution with conductivities of 1.5 mS/m,7, 7 mS/m and 16.9 S/m, its capacitance impedance coefficients are 0.05, 0. 035 and 0. 025, respectively,and conductivities of the solution are proportional to the capacitance impedance coefficients linearly. The results can offer a theoretical and experimental base for further research and applications of the TWEO.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第5期1093-1098,共6页
Optics and Precision Engineering
基金
高等学校学科创新引智计划资助项目(No.B07018)
关键词
行波电渗
理论模型
微流体驱动
仿真
traveling wave electroosmotic
theoretical model
pumping microflow
simulation
