微通道内液滴成型的模拟研究

A Simulation Study of the Formation Mechanism of Droplets in Microchannels

运用COMSOL软件,采用Level Set界面追踪方式,建立T型微通道模型模拟液滴成型过程,研究连续相流量与黏度对液滴成型机制的影响。结果表明:液滴直径随连续相流量增大而减小;随连续相黏度减小液滴直径增大;液滴生成频率随连续相黏度及分散相流量增大而增大。该结果丰富了微液滴的操控理论,对化工、制药、生物等领域的液滴成型工程应用有一定指导意义。

A T- shape microchannel model was established by using COMSOL and level set interface tracking method to simulate droplet forming process and study the influence of continuous phase's flow and viscosity. Results indicate that the droplet diameter increases with the decrease of continuous phase viscosity, but the diameter decreases with the increase of continuous phase flow rate. The droplet generation frequency increases with the increasing flow rate of the continuous phase. While it decreases with the increase of viscosity of continuous phase,which enriches the theory of micro- droplets formation, and provides practical guidance for the engineering of chemical, pharmaceuticals, biotech and so on.