电动微流体数值模拟研究进展

Research Progress on the Numerical Simulation of Electrokinetic Microfluids

针对微流体的研究现状,介绍了微流体的驱动与控制原理,将其分为电动控制技术和非电动控制技术。然后,分析了电动微流体的控制模型及数值模拟方法的类型,重点介绍了基于宏观方程的连续介质力学法、基于介观模拟的格子Boltzmann方法、基于微观运动的分子动力学方法和多种方法耦合的多尺度模拟等方法的原理、分类和特点以及在电动微流体研究中的应用现状。结合2D和3D微通道内流体参数、电场参数等的模拟结果,阐述了以上几种数值模拟方法的优缺点,指出了电动微流体数值模拟技术的发展方向和研究重点,对于微流体的理论研究和微流控器件的优化设计具有一定指导意义。

Aiming at the research status of microfluids, the actuating and controlling principles of microfluids are introduced. The control techniques are classified as the electrokinetic and nonelectrokinetic control techniques. The governing model and numerical simulation methods of the electrokinetic microfluid are analyzed. The principles, sorts and characteristics of the continuum medium mechanics method based on the macroscopic equation, lattice Boltzmann method based on the mesoscopic simulation, molecular dynamics method based on the microscopic locomotion and multiscale simulation method based on the coupling of multiplicate methods, and their applications in electrokinetic microfluids are presented emphatically. Considering the results of the flow field and electric field parameters in 2D and 3D microchannels, the merits and shortcomings of several numerical simulation methods are illuminated. The progress directions and research emphases of the numerical simulation in electrokinetic microfluids are pointed out, which provide a guide for the theory research in microfluids and optimization design in microfluidic devices.