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中文摘要：
本文采用有限体积法数值模拟了轴向方波电场和直流电场作用下，具有不同电泳淌度粒子的运动情况。结果表明，在半个方波电场周期内，具有不同电泳淌度的粒子在相同的时间内达到各自的稳定速度，周期变化的方波电场使微粒子在微通道内做往复的运动；在直流电场作用下，两个不同电泳淌度的粒子会在轴向方向上产生位移差。定义从溶液中分离粒子的最短距离与微通道高度的比值为分离效率，数值模拟结果表明，分离效率随横向电场强度和粒子电泳淌度的增加而减小。
英文摘要：
The movement of particles with different electrophoresis mobility under axial square-wave and direct current electric field was simulated numerically by finite volume method. The results show that the particles with different electrophoresis mobility reach the uniform motion in the same time during half periodicity of square-wave applied electric field. The particles oscillated within microchannel under the periodically varying square-wave applied electric field. The displacement difference along axial direction exists between the particles with different electrophoresis mobility under the direct current electric field. The ratio of the minimum distance that separates the particle from the solution and the micro-channel height is defined as the separation efficiency in order to research the particle separation with transverse electric field. The simulation shows that the separation efficiency decreases with the increase of transverse electric field and particle electrophoresis mobility.
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