| 微通道内电场频率对电渗流影响的数值模拟 |
| |
| 引用本文： | 张磊,刘莹.微通道内电场频率对电渗流影响的数值模拟[J].机械设计与研究,2011,27(3):35-38. |
| |
| 作者姓名： | 张磊 刘莹 |
| |
| 作者单位： | 南昌大学机电工程学院;青海大学机械系; |
| |
| 基金项目： | 国家自然科学基金重点资助项目(50730007) |
| |
| 摘 要： | 为研究二维微通道内交变电场电渗流速度特性,以双电层P-B方程和粘性不可压缩流体N-S方程为基础,建立交变电场电渗流的数学模型。应用有限元方法,对不同频率的交变电场电渗流进行数值模拟。结果表明,交变电场电渗流速度分布呈"波浪状",微通道中心区域速度滞后于壁面附近,当流体离壁面距离增大时,流体流速的滞后量增大。电场频率小于1 000 Hz时,交变电场电渗流与稳定电场电渗流具有相似的速度分布。随着电场频率的增大,"波浪状"速度流型更为明显,并且双电层滑移速度减小,尤其当电场频率大于3 000 Hz时,双电层滑移速度迅速下降。
|
| 关 键 词： | 微通道 双电层 交变电场 电渗流 电场频率 |
Numerical Simulation of the Frequency of Electric Field Effecting on Electroosmotic Flow in Microchannels |
| |
| ZHANG Lei,LIU Ying.Numerical Simulation of the Frequency of Electric Field Effecting on Electroosmotic Flow in Microchannels[J].Machine Design and Research,2011,27(3):35-38. |
| |
| Authors: | ZHANG Lei LIU Ying |
| |
| Affiliation: | ZHANG Lei1,2,LIU Ying1(1.School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,China,2.Department of Mechanical,Qinghai University,xining 810016,China) |
| |
| Abstract: | The mathematical models of electroosmotic flow driven by ac electric field based on P-B equation of electric double layer and N-S equation of viscous incompressible fluid were built,in order to study the velocity of alternant in 2D microchannels.Electroosmotic flow with different frequencies was numerically simulated by applying the finite element method.The results show that velocity distribution of alternant electroosmotic flow is wave-like,the velocity in the middle of microchannels is lag behind that ne... |
| |
| Keywords: | microchannels electric double layer(EDL) ac electric field electroosmotic flow(EOF) the frequency of electric field |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《机械设计与研究》浏览原始摘要信息 |
|
点击此处可从《机械设计与研究》下载全文 |
|
