| Spin-affected reflexive and stretching separation of off-center droplet collision | |
He CM(何成明); Yue LJ(岳连捷) ; Zhang,Peng
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| Corresponding Author | Zhang, Peng([email protected]) |
| Source Publication | PHYSICAL REVIEW FLUIDS
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| 2022-01-18 | |
| Volume | 7Issue:1Pages:25 |
| ISSN | 2469-990X |
| Abstract | Recent studies have demonstrated the significant roles of droplet self-spin motion in affecting the head-on collision of binary droplets. In this paper, we present a computational study by using the volume-of-fluid method to investigate the spin-affected droplet separation of off-center collisions, which are more probable in reality and phenomenologically richer than head-on collisions. Different separation modes are identified through a parametric study with varying spinning speed and impact parameter. A prominent finding is that increasing the droplet spinning speed tends to suppress the reflexive separation and to promote the stretching separation. Physically, the reflexive separation is suppressed because the increased rotational energy reduces the excessive reflexive kinetic energy within the droplet, which is the cause for the droplet reflexive separation. The stretching separation is promoted because the increased droplet angular momentum enhances the local stretching flow within the droplet, which tends to separate the droplet. The roles of orbital angular momentum and spin angular momentum in affecting the droplet separation are further substantiated by studying the collision between two spinning droplets with either the same or opposite chirality. In addition, a theoretical model based on conservation laws is proposed to qualitatively describe the boundaries of coalescence-separation transition influenced by droplet self-spin motion. |
| DOI | 10.1103/PhysRevFluids.7.013603 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000747882800001 |
| WOS Keyword | COALESCENCE ; SIMULATIONS ; MODELS |
| WOS Research Area | Physics |
| WOS Subject | Physics, Fluids & Plasmas |
| Funding Project | National Science Foundation of China[12102437] ; National Science Foundation of China[52176134] ; China Postdoctoral Science Foundation[2020M680690] ; Hong Kong RGC/GRF ; PolyU[152188/20E] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA17030100] |
| Funding Organization | National Science Foundation of China ; China Postdoctoral Science Foundation ; Hong Kong RGC/GRF ; PolyU ; Strategic Priority Research Program of Chinese Academy of Sciences |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Zhang, Peng |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/88415 |
| Collection | 高温气体动力学国家重点实验室 |
| Recommended Citation GB/T 7714 | He CM,Yue LJ,Zhang,Peng. Spin-affected reflexive and stretching separation of off-center droplet collision[J]. PHYSICAL REVIEW FLUIDS,2022,7,1,:25.Rp_Au:Zhang, Peng |
| APA | 何成明,岳连捷,&Zhang,Peng.(2022).Spin-affected reflexive and stretching separation of off-center droplet collision.PHYSICAL REVIEW FLUIDS,7(1),25. |
| MLA | 何成明,et al."Spin-affected reflexive and stretching separation of off-center droplet collision".PHYSICAL REVIEW FLUIDS 7.1(2022):25. |
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| Jp2022FA554_2022_Spi（6741KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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