A study on the MHD (magnetohydrodynamic) micropump with side-walled electrodes
A study on the MHD (magnetohydrodynamic) micropump with side-walled electrodes
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DOI：
10.1007/s12206-008-1107-0
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发表时间：
2009-03-01
影响因子：
1.6
通讯作者：
Choi, Bumkyoo
中科院分区：
文献类型：
--
作者：
Lim, Sangsoo;Choi, Bumkyoo
本文提出了一种应用于微流体系统的连续流动磁流体微泵，该泵采用侧壁电极，利用垂直于磁场和电场的洛仑兹力。一个理论上简化的MHD流动模型包括流体动力学和电磁学理论，它是基于稳态，不可压缩和充分发展的层流理论。采用有限差分法对不同工作电流和磁通密度下微通道内工质的速度分布进行了数值分析。此外，商业CFD代码CFD-ACE已被用于模拟MHD微型泵。当程序运行时（CFD-ACE），施加的电流和磁通密度被设置为影响MHD微泵性能的变量。采用MEMS工艺制作了磁流体微泵。MHD微泵的性能，通过测量流量作为所施加的直流电流从0到1 mA在4900和3300高斯的电极的长度分别为5000，7500和10000 μ m，分别改变。将实验结果与理论分析和数值计算结果进行了比较。此外，通过理论分析和初步实验，我们提出了一种简单的新型磁流体微泵的最终模型，该模型可应用于微流体系统。
This paper presents the continuous flow MHD(magnetohydrodynamic) micropump with side walled electrodes using Lorentz force, which is perpendicular to both magnetic and electric fields, for the application of microfluidic systems. A theoretically simplified MHD flow model includes the theory of fluid dynamics and electromagnetics and it is based upon the steady state, incompressible and fully developed laminar flow theory. A numerical analysis with the finite difference method is employed for solving the velocity profile of the working fluid across the microchannel under various operation currents and magnetic flux densities. In addition, the commercial CFD code called CFD-ACE has been utilized for simulating the MHD micropump. When the program was run(CFD-ACE), the applied current and magnetic flu:x density were set to be the variables that affected the performance of the MHD micropump. The MHD micropump was fabricated by using MEMS technology. The performance of the MHD micropump was obtained by measuring the flow rate as the applied DC current was changed from 0 to 1 mA at 4900 and 3300 Gauss for the electrodes with the lengths of 5000, 7500 and 10000 mu m, respectively. The experimental results were compared with the analytical and the numerical results. In addition, with the theoretical analysis and the preliminary experiments, we propose a final model for a simple and new MHD micropump, which could be applicable to microfluidic systems.