Liquid droplets are released in the concave‐wall jet to investigate their deformation and breakup characteristics. CCl₄ and water are the dispersed and continuous phases. The study reveals that the three modes of single droplets in the concave‐wall jet are non‐breakup, binary breakup, and multiple breakup. When the Weber (We) number is less than 30, the mode of binary‐breakup is primary for the droplets, however, there are only multiple‐breakup modes when We > 47. The non‐breakup and binary‐breakup modes are beneficial to the gravity and centrifugal separation because of little deformation and high axial velocity of the droplet. Effects of continuous‐phase tangential velocity and shear rate distribution on the droplet image sequence are studied. Droplet breakup occurs mainly in the region of high shear rate.

中文翻译：

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凹壁射流单滴变形和破裂的实验研究

液滴在凹壁射流中释放，以研究其变形和破裂特性。CCl ₄和水是分散相和连续相。研究表明，凹壁射流中单液滴的三种模式是非破裂，二元破裂和多重破裂。当韦伯（We）数小于30时，二元分解模式是液滴的主要模式，但是，当We> 47.非破碎和二元破碎模式有利于重力和离心分离，因为液滴变形小且轴向速度高。研究了连续相切速度和剪切速率分布对液滴图像序列的影响。液滴破裂主要发生在高剪切速率区域。