Research Initiation Award: Experimental and Numerical Investigation of the Binary Drop Collisions (REU Supplement W/M/D)

对不相容粘性液体环境中两个液滴的碰撞进行了实验和数值研究。对于不同的韦伯数、雷诺数、液滴尺寸比、周围流动特性和冲击参数，液滴的反弹、合并、分离和破碎将被可视化。通过改进以前开发的程序，对两个液滴在不相容的粘性液体中的迎头碰撞进行了数值模拟。对液滴形状和液滴内部流场的预测将与实验结果进行比较。这项研究将有助于更好地理解和预测大气雨滴的形成、液-液萃取、乳液聚合、稠密喷雾系统以及材料生产中的几个过程。

An experimental and numerical study of collision between two liquid drops in an immiscible viscous liquid environment is proposed. The drop bouncing, coalescence, separation and shattering will be visualized for different Weber numbers, Reynolds numbers, drop size ratios, surrounding flow characteristics and impact parameters. The head-on collision of two liquid drops in an immiscible viscous liquid will be numerically simulated, by improving a previously developed code. The predictions on drop shape and drop internal flow field will be compared to experiments. The proposed study will be useful to better understand and predict atmospheric rain drop formation, liquid-liquid extraction, emulsion polymerization, dense spray systems and several processes in material production.