化工进展Issue(10)：2583-2587,2654,6.DOI:10.3969/j.issn.1000-6613.2014.10.011
大深宽比双T形微通道内液-液两相流可视化研究
Flow visualization of liquid-liquid two-phase flow in a double T-type microchannel with large aspect ratio
摘要
Abstract
High speed digital camera was employed to investigate the liquid-liquid two-phase flow behavior in a double T-type microchannel with a rectangular cross-section, a hydraulic diameter of 0.176mm and an aspect ratio of 2.4. By changing the volumetric flow ratios of silicon oil (continuous phase) and water (dispersed phase),the two-phase flow pattern as well as the flow evolvement process were recorded and analyzed. At the upstream T-junction of the microchannel,the droplet,slug, wavy parallel,and parallel flow were observed. At the middle zone of the microchannel,a flow pattern map was presented on the basis of Weber numbers of water and oil. In addition,linear relationships between the dimensionless length of slug/droplet and water/oil flow ratios were established. Also,it was found that the velocity of slug/droplet was larger than the two-phase mixture superficial velocity, and a correlation for well predicting the velocity of slug/droplet was developed. Finally,droplet behaviors at the downstream T-junction of the microchannel were investigated,and two different flow modes,breaking and non-breaking were observed and analyzed. Corresponding two different regimes of breakup were singled out as well.关键词
微通道/可视化/液-液两相流/流型Key words
microchannel/visualization/liquid-liquid two-phase flow/flow pattern分类
能源科技引用本文复制引用
屈健,王谦,韩新月,何志霞,邵霞..大深宽比双T形微通道内液-液两相流可视化研究[J].化工进展,2014,(10):2583-2587,2654,6.基金项目
国家自然科学基金（51206065）、江苏省自然科学基金青年基金（BK2012291）及中国博士后基金（2013M540419）项目。 （）
