Dynamics of internal jets in the merging of two droplets of unequal sizes (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Dynamics of internal jets in the merging of two droplets of unequal sizes (PDF)
- 发表刊物：
- J Fluid Mech
- 摘要：
- The head-on collision, merging and internal mixing dynamics of two unequal-sized droplets were experimentally studied and interpreted, using water, n-decane and n-tetradecane to identify the distinguishing effects of surface tension and liquid viscosity on the merging and mixing patterns. It is shown that, upon merging of water and n-decane droplets, mushroom-like jets of dissimilar characteristics develop within the merged mass for small and large values of the impact Weber number (We), and that such jets are not developed for intermediate values of We. Furthermore, such jet-like mixing patterns were not observed for droplets of n-tetradecane, which has smaller surface tension and larger viscosity as compared to water. A regime nomogram relating the Ohnesorge and symmetric Weber numbers is constructed, providing a unified interpretation of the internal mixing patterns. Numerical simulations based on an improved volume-of-fluid method and an adaptive mesh refinement algorithm provide auxiliary diagnoses of the flow fields and the observed phenomena.
- 合写作者：
- Tang CL, Zhao JQ, Zhang P, Law CK, Huang ZH
- 卷号：
- 2016, 795: 671-689
- 页面范围：
- 671-689
- 是否译文：
- 否
- 发表时间：
- 2016-04-20