| Three-dimensional simulation of ligament formation and breakup caused by external vibration | |
Li YK1; Zhang M1 ; Wu K(吴坤)2
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| Corresponding Author | Wu, Kun([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2020-08-01 | |
| Volume | 32Issue:8Pages:17 |
| ISSN | 1070-6631 |
| Abstract | Ligament formation followed by breakup is the primary process that controls external vibration-driven liquid atomization. In this paper, single-mode Faraday instabilities with detailed interfacial dynamics are studied via three-dimensional simulations with a validated numerical methodology. The detailed mechanisms of ligament formation and its breakup are illuminated. Colliding flow from adjacent troughs results in a pressure increase at the root of the crest. This nonlinear flow structure produces a local maximum pressure point that liberates the liquid region above it from the bulk liquid layer that synchronously moves with the bottom substrate. The appearance of the maximum pressure point can thus be recognized as the indicator of ligament formation. The freed ligament with capillary waves on its surface continues to grow until successive breakup occurs at its tip, which is driven by the "short-wave mode" breakup mechanism. It is found that the tip contraction dynamics of Faraday-type ligament can be well described by a one-dimensional theoretical model of a low-speed liquid jet under temporally periodic acceleration. Finally, the development behaviors of Faraday-type ligament and liquid jet are compared quantitatively, which reveals the analogy in their breakup dynamics in the tip regions. |
| DOI | 10.1063/5.0006817 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000562829900001 |
| WOS Keyword | INDUCED DROP ATOMIZATION ; SURFACE-TENSION ; SPRAY CHARACTERIZATION ; CAPILLARY WAVES ; ADAPTIVE SOLVER ; FARADAY WAVES ; PINCH-OFF ; COMBUSTION ; DYNAMICS ; EJECTION |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China[51976011] ; LHD Youth Innovation Fund[LHD2019CX02] |
| Funding Organization | National Natural Science Foundation of China ; LHD Youth Innovation Fund |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Wu, Kun |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/84969 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Li YK,Zhang M,Wu K. Three-dimensional simulation of ligament formation and breakup caused by external vibration[J]. PHYSICS OF FLUIDS,2020,32,8,:17.Rp_Au:Wu, Kun |
| APA | Li YK,Zhang M,&吴坤.(2020).Three-dimensional simulation of ligament formation and breakup caused by external vibration.PHYSICS OF FLUIDS,32(8),17. |
| MLA | Li YK,et al."Three-dimensional simulation of ligament formation and breakup caused by external vibration".PHYSICS OF FLUIDS 32.8(2020):17. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2020289.pdf（14652KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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