Two-phase suspension flow in micro-channel driven by traveling dielectrophoresis

• Main Authors: Yong-Chi Lin, 林永錡
• Other Authors: 李雨
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/79542149012533798641

碩士 === 國立臺灣大學 === 應用力學研究所 === 93 === In the study, I drive the two phase suspension flow with the traveling-wave dielectrophoresis. There are three parts in my study. First, it’s about the condition of grid dependence test. The best grid system is time grid , electric field grid 0.5μm, controlling volume from the source term ,and the distance between grid of the flow field . Second, how serious does dielectrophoresis drive the particle because of influence from drag, when the length increases? The other topic is the effect from dielectrophoresis driving the particle caused by different design of electric poles. I found that the poles put in upside wall and down wall may result to the average velocity, 4145μm/sec. And when putting in parallel, the average velocity could reach 4737μm/sec. If combing the two design, it will be better. The final part is about the result of the two way coupling when the conductivity and the permittivity change. And the result is that the coupling outlet average velocity, 2642μm/sec, compare with the result when considering the permittivity and the conductivity in the channel space are constant. The former will be better.