化工学报2018，Vol.69Issue(2)：650-654,5.DOI:10.11949/j.issn.0438-1157.20170968
聚焦十字型微通道内高黏流体中气泡生成动力学
Bubble forming dynamics of highly viscous fluids in microfluidic flow-focusing cross channel device
摘要
Abstract
N2bubble formation in highly viscous (630 mPa·s) glycerol-water solution in a microfluidic flow-focusing cross channel device was observed by using a high-speed camera. Bubble forming process, size, and minimal neck radius were studied. The results show that the bubble formation process can be divided into stages of retraction, expansion, collapse, and final breakup. The bubble size was increased linearly with time in both expansion and collapse stages, which the slope in the collapse stage was greater than that in the expansion stage. The decrease of minimal neck radius of bubbles against time was different in two stages, i.e., a power-law to remaining time in the collapse stage and a linearity with time in the final breakup stage.关键词
微通道/高黏流体/两相流/气泡/动力学Key words
microchannels/highly viscous liquids/two-phase flow/bubble/dynamics分类
化学化工引用本文复制引用
张翀,付涛涛,姜韶堃,朱春英,马友光..聚焦十字型微通道内高黏流体中气泡生成动力学[J].化工学报,2018,69(2):650-654,5.基金项目
国家自然科学基金项目(21576186,91634105,91434204,21276175).supported by the National Natural Science Foundation of China(21576186,91634105,91434204,21276175). （21576186,91634105,91434204,21276175）
