化学工程2025，Vol.53Issue(2)：38-43,6.DOI:10.3969/j.issn.1005-9954.2025.02.007
高黏度比时挡板结构对心形微通道内流场特性的影响
Influence of baffle structure on flow field characteristics in heart-shaped microchannels under high viscosity ratio
摘要
Abstract
Due to the small channel size and laminar flow,microchannel mixing is always a challenging task,especially for two high viscosity ratio fluids,which are prone to layering during the mixing process,resulting in uneven mixing and affecting reaction efficiency.In order to improve this situation,the mixing structure suitable for high viscosity difference liquid-liquid heterogeneous fluids was determined by changing the type of baffle inside the channel.The finite element software Fluent was used to simulate the liquid flow and mixing inside microchannels with different structures,and the velocity distribution,pressure field and mixing uniformity index were studied.The flow characteristics of the internal flow field of three different baffle microchannels were elaborated in detail,and the relationship between different baffle structures,mixing effects and pressure difference was obtained.The numerical simulation results show that the flow velocity in the three microchannels is vA＞vC＞vB,and the pressure difference is △pA=227 560 Pa,△pB=218 633 Pa and △pC=223 621 Pa,respectively.It can be concluded that the A-shaped baffle microchannel has the highest velocity and pressure loss,indicating that the heart-shaped microchannel with an arc-shaped baffle structure is more conducive to high viscosity difference liquid-liquid mixing.The different baffle structures of microchannels have a significant impact on the heterogeneous mixing process of high viscosity liquid,and have important guiding significance for engineering design and experiments.关键词
高黏度比流体/心形微通道/混合效果/数值模拟/挡板结构Key words
high viscosity ratio fluid/heart-shaped microchannel/mixing effect/numerical simulation/baffle structure分类
化学化工引用本文复制引用
马静静,陈鸿福,刘学鑫,李鹏飞,胡临博,段振亚..高黏度比时挡板结构对心形微通道内流场特性的影响[J].化学工程,2025,53(2):38-43,6.基金项目
山东省自然科学基金资助项目(ZR2024MB134) （ZR2024MB134）
山东省科技型中小企业创新能力提升工程(2023TSGC0493) （2023TSGC0493）
