摘要
研究了双T型微通道内气液液三相微分散过程,获得了水包油包气复乳型三相流和含有气泡的液液平行流两种主要流型,探讨了流体的进料顺序、三相表观流速和微通道内受限空间对于三相流型的影响,建立了流型分布图表。制备了平均体积在22～54nl的单分散微气泡和平均体积在60～81nl的油包气复合分散流体,根据气相在Rayleigh-Plateau效应下的破碎机制建立了基于气液相比的分散尺寸数学模型。
The fluid dynamics of the gas-liquid-liquid three-phase micro-dispersion process was studied in a double T-junction microchannel device. Two main flow patterns named ＂gas-in-oil-in-water coupled emulsion flow＂ and ＂bubble contained oil-water parallel flow＂ were observed and the effects of fluid feeding sequence, superficial velocity and confined microchannel on those flow patterns were discussed. A flow pattern map was established based on the experimental result to describe the flow pattern evolution. Mono- dispersed micro-bubbles with average volume ranging from 22 nl to 54 nl were controllably prepared together with the gas-in-oil coupled dispersed phase, whose average volume changed from 60 nl to 81 nl. Based on the Rayleigh-Plateau break-up mechanism of gas phase, mathematical equations were established to calculate the dispersed volumes of bubbles and coupled emulsions.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2013年第2期470-475,共6页
CIESC Journal
基金
国家自然科学基金项目(21036002,21106076)
化学工程联合国家重点实验室开放课题项目(SKL-CHE-11A01)~~
关键词
微化工系统
微流控
微通道
气液液三相
microstructured chemical system
microfluidic
microchannel
gas-liquid-liquid three-phase
