On Richtmyer-Meshkov finger collisions in a light fluid layer under reshock conditions
文献类型：期刊论文
| 作者 | Guo, Xu2; Cong, Zhouyang2; Si, Ting2; Luo XS(罗喜胜)1,2 |
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2024-12-02 |
| 卷号 | 1000页码:31 |
| 关键词 | shock waves |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2024.1050 |
| 通讯作者 | Si, Ting(tsi@ustc.edu.cn) |
| 英文摘要 | The fingers known as bubbles (spikes) resulting from the penetration of light (heavy) fluids into heavy (light) fluids are significant large-scale features of Richtmyer-Meshkov instability (RMI). Through shock-tube experiments, we study finger collisions in light fluid layers under reshock conditions. Four unperturbed fluid layers with varying thicknesses are created to analyse the motion of waves and interfaces during finger collisions. The wave dynamics, sensitive to initial layer thicknesses, are characterized by a one-dimensional theory. Eight perturbed fluid layers, with four thicknesses and two interface phase combinations, are generated to explore the finger collision mechanism. It is shown that after reshock, the initial in-phase and anti-phase cases undergo spike-bubble rear-end collisions (SBCs) and spike-spike head-on collisions (SSCs), respectively. Compared with SBCs, SSCs significantly suppress spike growth, leading to the attenuation of perturbation growth, especially for larger thicknesses. As the initial thickness decreases, an SSC impedes the downstream interface from reversing its phase, resulting in abnormal RMI, thereby reducing the SSC's effectiveness in attenuating growth. The effects of rarefaction waves enhance both interfaces' amplitudes and the whole layer's thickness, diminishing the intensity of finger collisions, while the second reshock exerts an opposing influence. Linear and nonlinear models, incorporating the influence of reshocks and rarefaction waves, are developed to predict the interface perturbation growth before and after finger collisions. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | RAYLEIGH-TAYLOR ; SCALE PERTURBATIONS ; INSTABILITY GROWTH ; SINGLE-MODE ; INTERFACE ; SIMULATIONS ; TRANSITION ; STABILITY |
| 资助项目 | National Natural Science Foundation of China[12302371] ; National Natural Science Foundation of China[12027801] ; National Natural Science Foundation of China[12388101] ; Youth Innovation Promotion Association CAS ; Chinese Academy of Sciences Project for Young Scientists in Basic Research[YSBR-087] ; Fundamental Research Funds for the Central Universities[WK2090000048] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001368614100001 |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Chinese Academy of Sciences Project for Young Scientists in Basic Research ; Fundamental Research Funds for the Central Universities |
| 其他责任者 | Si, Ting |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97750]  |
| 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; |
| 推荐引用方式 GB/T 7714 | Guo, Xu,Cong, Zhouyang,Si, Ting,et al. On Richtmyer-Meshkov finger collisions in a light fluid layer under reshock conditions[J]. JOURNAL OF FLUID MECHANICS,2024,1000:31. |
| APA | Guo, Xu,Cong, Zhouyang,Si, Ting,&罗喜胜.(2024).On Richtmyer-Meshkov finger collisions in a light fluid layer under reshock conditions.JOURNAL OF FLUID MECHANICS,1000,31. |
| MLA | Guo, Xu,et al."On Richtmyer-Meshkov finger collisions in a light fluid layer under reshock conditions".JOURNAL OF FLUID MECHANICS 1000(2024):31. |
入库方式： OAI收割
来源：力学研究所
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