Abstract:

The highly integrated microfluidic system has been widely used in many scientific fields due to its advantages such as large specific surface area, short transfer distance, and fast mixing speed, etc. However, the interaction and dynamic behavior of multiphase flows in microchannels are affected by many aspects, hence, it is difficult to fully understand the multiphase mass and heat transfer process, obtain flow field characteristic parameters, and reveal the interaction of multiphase flows only through experimental observation techniques and theoretical prediction methods. Compared to the formers, the rapid development of CFD-numerical simulation technology provides a more intuitive, effective, and accurate alternative approach for the prediction and analysis of multiphase flow characteristics in microfluidic channels. In this paper, the application process of numerical simulation technology for multiphase flow characteristics study in droplet-microfluidic systems is comprehensively reviewed, covering the structure and evolution of droplet-microfluidic devices, the method, and optimization of numerical simulation, as well as the process and interaction of multiphase flow in the microchannel.

Key words: microfluidics, numerical simulation, multiphase flows

摘要：

高集成化的微流控系统具有界面面积大、传递距离短、混合速度快等优势，已被广泛应用于许多科学领域。然而，微通道内多相流间的相互作用及动力学行为受多方面的影响，仅依靠试验观测技术和理论预测方法难以全面了解多相流传质传热过程、获取流场特性参数、揭示多相流相互作用规律。当下CFD数值模拟技术的快速发展为预测和分析微流控通道内的多相流问题提供了更为直观、有效、准确的帮助。本文对数值模拟技术在液滴微流控多相流特性研究的应用进展进行全面综述，涵盖液滴微流控装置结构及演变、液滴微流控模拟方法及优化以及微通道内多相流作用过程及原理。

关键词: 微流控, 数值模拟, 多相流