论文标题
排水沟对微流体T结中液滴产生的效果
The Effect of Junction Gutters for the Upscaling of Droplet Generation in a Microfluidic T-Junction
论文作者
论文摘要
由于微肋骨样结构而导致的滴形成的影响，即在标准微流体T结构内的结沟（JGS）的影响。鉴定出导致各种流动状态的流体动力条件以毛细血管数（CA）（CA）和速度比在标准T结构内的分散相和连续相（Q）的速度比。随后，在这种情况下，在标准通道中引入了一系列的天沟配置。结果预测，JGS的引入可以有利地改变滴的形成频率和形态，因此，对于与低CA相关的流体动力学条件，可以显着促进升级。提供了详细的流量图，揭示了在具有较高Ca和Q的液滴形成期间的大量过渡图，否则该液滴表示标准连接处的滴水或喷气机制。但是，确定了特定的天沟构型，而JGS不利于生成单分散液滴。
The influence of drop formation due to micro rib-like structures, viz., the Junction Gutters (JGs) within a standard microfluidic T-junction, is numerically investigated. Hydrodynamic conditions that lead to various flow regimes are identified characterized by the Capillary number (Ca) and velocity ratios of the dispersed and continuous phases (q) within a standard T-junction. Subsequently, under such conditions, a range of gutter configurations is introduced in the standard channel. The results predict that the introduction of JGs can favourably alter the formation frequency and morphology of drops and, consequently, promote upscaling significantly for the hydrodynamic conditions associated with low Ca. Detailed flow maps are presented that reveal a plethora of transitions during the formation of droplets with higher Ca and q that would otherwise signify a dripping or a jetting regime in a standard junction. However, specific gutter configurations are identified where JGs are unfavourable for generating monodisperse droplets.
