基于格子Boltzmann方法的Y型和倒Y型微反应器的混合传质特性研究

Research on Characteristics of Mixing and Mass Transfer in Y-Type and Inverted Y-Type Microreactors Based on Lattice Boltzmann Method

连续流微反应技术的迅速发展为化学合成技术提供了一条可精准控制的路径。其微反应器中尺度效应和构型对参反流体的流场结构、混合传质以及化学反应影响极大。本工作组建有效的串行竞争反应格子Boltzmann模型,通过该模型对Y型和倒Y型微反应器的流场结构、混合传质和化学反应进行数值模拟研究。结果表明:微反应器中的流动以层流为主,其混合器中的对流传质强度很小,微反应器中化学反应以扩散传质为基础进行反应。数值模拟所得结论可为连续流微反应器设计以及微反应精准控制提供有意义的参考。

The rapid development of continuous flow microreactors provides an accurate control path for chemical synthesis technology.However,the scale effect and configuration of the microreactor have a great influence on the flow structure,mass transfer,and chemical reaction of the reaction fluid.In this paper,an effective virtual serial competitive reaction Lattice Boltzmann model was used in the microfluid.The flow field structure,mixing mass transfer,and chemical reaction of Y-type and inverted Y-type microreactors were numerically studied.It was found that the flow in the microreactor was mainly laminar flow,the convective mass transfer intensity in its mixer was very small,and the chemical reaction in the microreactor was based on diffusion mass transfer.The results of the numerical simulation can provide a meaningful reference for the design of continuous flow microreactor and the precise control of microreaction.