| NUMERICAL STUDY OF PERIODICAL FLOWS OF PIEZOELECTRIC VALVELESS MICROPUMP FOR BIOCHIPS |
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| 作者姓名： | ZHANG Yong-li |
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| 作者单位： | Mechanics Department，Huazhong University of Science and Technology，Mechanics Department，Huazhong University of Science and Technology Wuhan 430074，P.R.China，Wuhan 430074，P.R.China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 10472036） |
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| 摘 要： | IntroductionMicro-pump is one of the most important fluid-driving elements in biochips. Workingprinciple of micropumps is quite different from traditional macro-scale pumps. Currently,valveless piezoelectric micropump is one of the most popular micropumps…
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| 关 键 词： | 微型抽水机 有限元分析 扩散体 周期流程 生物芯片 |
| 文章编号： | 0253-4827（2005）08-1026-08 |
| 收稿时间： | 2004-05-21 |
| 修稿时间： | 2005-03-22 |
Numerical study of periodical flows of piezoelectric valveless micropump for biochips |
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| Zhang Yong-li,Wu Jian-kang.NUMERICAL STUDY OF PERIODICAL FLOWS OF PIEZOELECTRIC VALVELESS MICROPUMP FOR BIOCHIPS[J].Applied Mathematics and Mechanics(English Edition),2005,26(8):1026-1033. |
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| Authors: | Zhang Yong-li Wu Jian-kang |
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| Institution: | Mechanics Department, Huazhong University of Science and Technology, Wuhan 430074, P. R. China |
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| Abstract: | Shallow water model was employed to approximate the three-dimensional flows of a thin micropump to a two-dimensional thickness-averaged flows. The finite element method and pressure correction algorithm were used to solve the two-dimensional flows of the pump and calculate the pump flow rate. The numerical results indicate that: 1) Phase differences in time of flow velocities and backflows occur across section of diffuser connecting to pump chamber; 2) A pair of symmetric vortexes appear inside the pump chamber at the end of suction flow phase; 3) The directional flow rate of the pump is dominated by nonlinearity of Navier-Stokes equations.Quantitative relations of the pump flow rate versus the ratio of diffuser length to width, the ratio of diffuser thickness to width, fluid viscosity and backpressure were also given. Possibly maximal flow rate can be achieved by optimizing the pump parameters. |
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| Keywords: | micro-pump diffuser finite element method |
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