Modeling microparticles' path in DEP-FFF microfludic devices
Modeling microparticles' path in DEP-FFF microfludic devices
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DOI：
10.1109/rsm.2015.7354997
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
B. Mathew;A. Alazzam;Mohammad Abutayeh;I. Stiharu
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文献类型：
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作者：
B. Mathew;A. Alazzam;Mohammad Abutayeh;I. Stiharu
本文记录了一个动态模型的发展，用于预测微粒的轨迹在DEP-FFF微流控装置。电极配置使得顶表面和底表面支撑在几微米范围内的多个有限尺寸的电极。微通道内的电势采用拉普拉斯方程的形式，而运动方程基于牛顿第二定律。考虑的力包括由于惯性、阻力、重力、浮力和介电电泳。控制方程采用有限差分法求解，空间步长为0.5 μm，时间步长为10-4s。此外，进行参数研究，以了解操作和几何参数对微粒路径的个别影响。所考虑的参数包括微粒半径、驱动电压、体积流速和微通道高度。结果表明，所有的参数影响的瞬时轨迹的微粒，而只有少数参数影响的最终悬浮高度的微粒。
This article documents the development of a dynamic model for predicting the trajectory of microparticles in a DEP-FFF microfluidic device. The electrode configuration is such that the top and bottom surfaces support multiple finite sized electrodes in the range of few micrometers. The electric potential inside the microchannel takes the form of Laplace equation while the equations of motion are based on Newton's second law. The forces considered include that due to inertia, drag, gravity, buoyancy and dielectrophoresis. All governing equations are solved using finite difference method with a spatial step size of 0.5 μm and temporal step size of 10-4s. In addition, a parametric study is carried out in order to understand the individual influence of operating and geometric parameters on the path of microparticles. The parameters considered include microparticle radius, actuation voltage, volumetric flow rate and microchannel height. It is found that all parameters influence the transient trajectory of microparticles while only a few parameters influence the final levitation height of microparticles.