高校化学工程学报2011，Vol.25Issue(6)：916-922,7.DOI:33-1141/TQ.20111104.1636.006
矩形微通道内气液两相流型及其转换边界的实验研究
Gas-Liquid Two-Phase Flow Patterns and Boundaries ina Rectangular Microchannel
摘要
Abstract
The prediction of gas-liquid two-phase flow patterns is fundamental for the design and process control of microfluidic systems. In this work, the flow patterns and boundaries of nitrogen gas and two miscible liquids (the aqueous surfactant solution and ethanol or acetone) in a rectangular microchannel (hydraulic diameter Dh=0.29 mm) with cross and T-shaped junctions were studied experimentally. Different flow patterns such as bubble flow, slug flow, churn flow and stratified flow, were observed by a visualization method at gas superficial velocities ranged from 0.012 to 22.391 ms"1 and the miscible liquids superficial velocities from 0.006 to 1.508 m·s-1. The depicted flow pattern maps were compared with the flow boundaries reported in the literatures. The obtained experimental values of flow pattern transitions were compared with the predictions given by the correlation reported in the literatures. A modified correlation was obtained by considering Weber number, which is available in the prediction of the transition from slug flow to churn flow under the present experimental conditions.关键词
矩形微通道/两相流/流型/流型图/流型边界Key words
rectangular microchannel/ two-phase flow/ flow patterns/ flow pattern maps/ flow pattern boundaries分类
数理科学引用本文复制引用
刘谦,张颂红,沈绍传,负军贤,姚克俭,徐林红..矩形微通道内气液两相流型及其转换边界的实验研究[J].高校化学工程学报,2011,25(6):916-922,7.基金项目
国家自然科学基金资助项目(20606031,21036005) （20606031,21036005）
流体动力与机电系统国家重点实验室开放基金项目(GZKF-201010). （GZKF-201010）
