Generating Gas-Liquid-Liquid Three-Phase Microflows in a Cross-Junction Microchannel Device
Generating Gas-Liquid-Liquid Three-Phase Microflows in a Cross-Junction Microchannel Device
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在交叉连接微通道装置中产生气-液-液三相微流
DOI：
10.1002/ceat.201200561
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发表时间：
2013-06-01
影响因子：
2.1
通讯作者：
Wang, Tao
中科院分区：
文献类型：
--
作者：
Wang, Kai;Lu, Yangcheng;Wang, Tao
对交叉连接微通道内气液液三相微流的产生进行了实验研究。以油相为连续相，描述了交叉口处的3种气相和8种水相流动方式。与气-液和液-液两相微流相比，三相微流中分散相的流动行为相似，但需要引入新的毛细数和分散相的相比来区分复杂的三相流模式。虽然三相流在通道交界处是汞，只有六个流型观察到下游微通道。根据实验结果，指出了气泡/液滴生成方式对其尺寸分布的影响。分析了气泡和液滴的产生机理，建立了气泡和液滴平均体积的关联式。
The generation of gas-liquid-liquid three-phase microflows in a cross-junction microchannel device is experimentally analyzed. Three gas-phase and eight water-phase flow manners at the cross junction are described with oil phase as continuous phase. Comparing with the gas-liquid and liquid-liquid two-phase microflows, similar flow behaviors of dispersed phases exist in the three-phase processes but new capillary numbers as well as the phase ratio of dispersed phases need to be introduced in the flow maps to distinguish the complicated three-phase flow modes. Although the three-phase flows are mercurial at the channel junction, only six flow patterns are observed in the downstream microchannel. According to the experimental results, the effects of bubble/droplet generation manners on their size distributions are indicated. The generation mechanisms of bubbles and droplets are analyzed and correlated equations are established for their average volumes.