论文标题
将一个分为三个：表面张力驱动的液滴分解
Breaking one into three: surface-tension-driven droplet breakup in T-junctions
论文作者
论文摘要
液滴分解是微流体领域的重要现象，可以产生子液滴。在这项工作中，报道了广泛研究的T结构几何形状中的一种新颖的分解状态，在该几何形状中，捏合在两个出口通道中横向发生，导致形成三个子液滴，而不是在常规T式连接处的中心，这导致了两个女儿滴。证明这种新机制是由表面张力驱动的，并提出了T型几何形状的设计规则。开发了毛细血管数$ CA $低值的模型，以预测构成这种横向破裂机制的基础载体流体口袋的形成和增长。在$ CA $的较高值时，中央分手的常规制度再次占主导地位。探索了新的和传统制度之间的竞争。总的来说，这种新颖的液滴形成方法在T结中提供了交替的液滴尺寸和组成的功能，这对于设计新的微流体工具的设计可能很重要。
Droplet breakup is an important phenomenon in the field of microfluidics to generate daughter droplets. In this work, a novel breakup regime in the widely studied T-junction geometry is reported, where the pinch-off occurs laterally in the two outlet channels, leading to the formation of three daughter droplets, rather than at the center of the junction for conventional T-junctions which leads to two daughter droplets. It is demonstrated that this new mechanism is driven by surface tension, and a design rule for the T-junction geometry is proposed. A model for low values of the capillary number $Ca$ is developed to predict the formation and growth of an underlying carrier fluid pocket that accounts for this lateral breakup mechanism. At higher values of $Ca$, the conventional regime of central breakup becomes dominant again. The competition between the new and the conventional regime is explored. Altogether, this novel droplet formation method at T-junction provides the functionality of alternating droplet size and composition, which can be important for the design of new microfluidic tools.
