当前位置:
X-MOL 学术
›
Chem. Eng. Sci.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental Study on Millimeter-scale W1/O/W2 Compound Droplets Formation in a Co-flowing Device with Two-step Structure
Chemical Engineering Science ( IF 4.7 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.ces.2020.115493 Dawei Pan , Qiang Chen , Shufan Chen , Bo Li
Chemical Engineering Science ( IF 4.7 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.ces.2020.115493 Dawei Pan , Qiang Chen , Shufan Chen , Bo Li
Abstract W1/O/W2 compound droplets generation in a co-flowing microfluidic device with two-step structure was observed through experiments, and the formation process is quantitatively studied. Further the effects of the flow rates of all phases as well as the viscosity of W2 phase on the geometric size are extensively investigated. The results indicate that the outer diameter of compound droplets mainly depends on the flow rate and viscosity of external phase. The core water droplet diameter can be controlled by adjusting the flow rates of both inner and middle phases, and it is more sensitive to inner phase. Generally, the inner diameter of compound droplets is not only relative to the core droplet diameter, but also influenced by the encapsulated core water droplet number. Finally, a prediction correlation for dimensionless outer diameter with several dimensionless numbers is obtained. The results could provide an experimental basis for controllably preparing millimeter-scale monodisperse compound droplets.
中文翻译:
两级结构共流装置中毫米级W1/O/W2复合液滴形成的实验研究
摘要 通过实验观察了两步结构共流微流控装置中W1/O/W2复合液滴的生成,并定量研究了其形成过程。此外,广泛研究了所有相的流速以及 W2 相的粘度对几何尺寸的影响。结果表明,复合液滴的外径主要取决于外相的流速和粘度。核心水滴直径可以通过调节内相和中相的流速来控制,对内相更敏感。通常,复合液滴的内径不仅与核心液滴直径有关,而且还受包裹的核心液滴数的影响。最后,获得了具有多个无量纲数的无量纲外径的预测相关性。研究结果可为可控制备毫米级单分散复合液滴提供实验依据。
更新日期:2020-04-01
中文翻译:
两级结构共流装置中毫米级W1/O/W2复合液滴形成的实验研究
摘要 通过实验观察了两步结构共流微流控装置中W1/O/W2复合液滴的生成,并定量研究了其形成过程。此外,广泛研究了所有相的流速以及 W2 相的粘度对几何尺寸的影响。结果表明,复合液滴的外径主要取决于外相的流速和粘度。核心水滴直径可以通过调节内相和中相的流速来控制,对内相更敏感。通常,复合液滴的内径不仅与核心液滴直径有关,而且还受包裹的核心液滴数的影响。最后,获得了具有多个无量纲数的无量纲外径的预测相关性。研究结果可为可控制备毫米级单分散复合液滴提供实验依据。