Experimental investigation of cylindrically divergent Rayleigh-Taylor instability on a water-air interface
文献类型：期刊论文
| 作者 | Liang, Yu1,3; Luo XS(罗喜胜)1,2 |
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2025-07-28 |
| 卷号 | 1016页码:12 |
| 关键词 | instability multiphase flow |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2025.10430 |
| 通讯作者 | Liang, Yu(xluo@ustc.edu.cn) ; Luo, Xisheng(liangyu@imech.ac.cn) |
| 英文摘要 | This study investigated the cylindrically divergent Rayleigh-Taylor instability (RTI) on a liquid-gas interface and its dependence on initial conditions. A novel hydrophobic technique was developed to generate a two-dimensional water-air interface with controlled initial conditions. The experimental configuration utilised high-pressure air injection to produce uniform circumferential acceleration. Amplitude measurements over time revealed that the cylindrical RTI growth depends strongly on the azimuthal wavenumber. Experimental results demonstrated that surface tension significantly suppresses the liquid-gas cylindrical RTI, even inducing a freeze-out and oscillatory perturbation growth - a phenomenon observed for the first time. Spectrum analysis of the interface contours demonstrated that the cylindrical RTI evolves in a weakly nonlinear regime. Linear and weakly nonlinear models were derived to accurately predict the time-varying interface amplitudes and high-order modes. The linear model was further used to determine conditions for unstable, freeze-out and oscillatory solutions of the cylindrically divergent RTI. These findings offer valuable insights into manipulating hydrodynamic instabilities in contracting/expanding geometries using surface tension. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | FLUID |
| 资助项目 | Natural Science Foundation of China[12388101] ; Natural Science Foundation of China[24FAA00998] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001536945400001 |
| 资助机构 | Natural Science Foundation of China |
| 其他责任者 | Liang, Yu，罗喜胜 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102334]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.Univ Sci & Technol China, Dept Modern Mech, Adv Prop Lab, Hefei 230026, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liang, Yu,Luo XS. Experimental investigation of cylindrically divergent Rayleigh-Taylor instability on a water-air interface[J]. JOURNAL OF FLUID MECHANICS,2025,1016:12. |
| APA | Liang, Yu,&罗喜胜.(2025).Experimental investigation of cylindrically divergent Rayleigh-Taylor instability on a water-air interface.JOURNAL OF FLUID MECHANICS,1016,12. |
| MLA | Liang, Yu,et al."Experimental investigation of cylindrically divergent Rayleigh-Taylor instability on a water-air interface".JOURNAL OF FLUID MECHANICS 1016(2025):12. |
入库方式： OAI收割
来源：力学研究所
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