【作者】 邱阳； 徐银香； 王飞； 汪华林；

【Author】 YANG Qiu;YINXIANG Xu;FEI Wang;HUALIN Wang;Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,East China University of Science and Technology;

【机构】 华东理工大学国家环境保护化工过程环境风险评价与控制重点实验室；

【摘要】 选取共轴型与聚焦型的液滴微流控装置,对其中的流体剪切与液滴成形过程进行观察,发现在不同的装置结构及流体条件下,微通道内的流体存在dripping与jetting两种流变学现象。利用高速摄像技术,研究了两种装置内的dripping与jetting机理对颗粒产品参数的影响。此外,通过引入无量纲参数Caout与Wein,对dripping与jetting机理的转化条件与控制因素做出了定量描述。研究结果对微流控装置选型与产品参数控制有一定的指导意义。更多还原

【Abstract】 The fluid shear and droplet formation process were observed in both co-flow and flow-focusing microfluidic device.Two distinct rheological phenomena,dripping and jetting,were found in different device structure and fluid conditions.The influence of dripping and jetting mechanism on particle parameters was studied by high-speed camera technology.Besides,two dimensionless parameters,Caout and Wein,were introduced to make quantitative description for the transition and control conditions for dripping and jetting regimes.The results could offer guidance for microfluidic device choice and product parameters control.更多还原