Transient simulation of electroosmotic flow in microchannels
This paper reports a numerical study on the transient electroosmotic flow in open-end straight parallelplate microchannels. To simulate the flow, the Poisson-Boltzmann equation describing the electrical distribution and the modified Navier-Stokes equations governing the velocity field are presented. The equations are solved using COMSOL Multiphysics software. Parametric studies are carried out to examine the time evolution and the spatial distribution of the electroosmotic flow under the effects of the electrical field strength, channel size, ionic concentration. It is found that the velocity distribution of microflow is plug-like, which is proportion to the applied electrical field strength and zeta potential, while irrelevant with the height of microchannel. The scale of steady time of microflow is microsecond, and the magnitude is proportion to the square of ratio of height of microchannel, while irrelevant with the electric field strength and ionic concentration.
electroosmotic flow electric double layer numerical simulation COMSOL Multiphysics
Dayong Yang
School of Environmental and Chemical Engineering, Nanchang University, Nanchang, 330031, China
国际会议
The Third International Conference on Modelling and Simulation(第三届国际建模、计算、仿真、优化及其应用学术会议 ICMS 2010)
无锡
英文
350-354
2010-06-04（万方平台首次上网日期，不代表论文的发表时间）