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Rarefaction-induced Rayleigh-Taylor growth for a heavy gas layer

文献类型：期刊论文

作者Xu, Zhu2; Guo, Xu1; Zhai, Zhigang1; Luo XS(罗喜胜)1
刊名PHYSICS OF FLUIDS
出版日期2025-07-01
卷号37期号:7页码:13
ISSN号1070-6631
DOI10.1063/5.0269876
通讯作者Guo, Xu(clguoxu@ustc.edu.cn)
英文摘要The Rayleigh-Taylor (RT) interface evolution of a heavy gas layer driven by rarefaction waves is investigated. Distinct air/SF6/air gas layers with varying thicknesses and phase combinations are examined to assess the influence of initial conditions on interface coupling. Accelerated by rarefaction waves, the first interface exhibits RT-stable evolution, characterized by a sustained oscillation in perturbation amplitude, while the second interface remains RT-unstable, showing continuous perturbation amplitude growth. The RT-stable evolution of the first interface induces dynamic coupling between the two interfaces. Specifically, when the two interfaces are in-phase, dynamic coupling suppresses perturbation growth at both interfaces in the early stage, but enhances the developments of both interfaces in the late stage. Conversely, when the two interfaces are anti-phase, dynamic coupling exerts an opposing influence on interface evolution. By incorporating the time-varying acceleration and density in rarefaction-driven flows, the linear model proposed by Mikaelian ["Rayleigh-Taylor and Richtmyer-Meshkov instabilities in finite-thickness fluid layers," Phys. Fluids 7, 888-890 (1995)] accurately predicts the early-time amplitude growth in most cases. The bubble and spike Froude numbers for the second interface exceed predictions from the nonlinear models under constant acceleration and density. This discrepancy arises because, in rarefaction-driven flows, the decreasing density reduces the drag acting on the bubble and spike tips, causing them to reach larger asymptotic velocities to balance the drag and buoyancy forces.
分类号一类/力学重要期刊
WOS关键词RICHTMYER-MESHKOV INSTABILITIES ; ACCELERATION ; SHOCK ; FLUIDS ; FLOWS
资助项目National Natural Science Foundation of China10.13039/501100001809[12302371] ; National Natural Science Foundation of China10.13039/501100001809[12372281] ; National Natural Science Foundation of China10.13039/501100001809[12388101] ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS[XDB0620201] ; Strategic Priority Research Program of Chinese Academy of Sciences[WK2090000048] ; Fundamental Research Funds for the Central Universities
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:001522172200002
资助机构National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program of Chinese Academy of Sciences ; Fundamental Research Funds for the Central Universities
其他责任者Guo, Xu
源URL[http://dspace.imech.ac.cn/handle/311007/102250]  
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.Univ Sci & Technol China, Sch Engn Sci, State Key Lab High Temp Gas Dynam, Hefei 230026, Peoples R China
2.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China;
推荐引用方式
GB/T 7714		 Xu, Zhu,Guo, Xu,Zhai, Zhigang,et al. Rarefaction-induced Rayleigh-Taylor growth for a heavy gas layer[J]. PHYSICS OF FLUIDS,2025,37(7):13.
APA Xu, Zhu,Guo, Xu,Zhai, Zhigang,&罗喜胜.(2025).Rarefaction-induced Rayleigh-Taylor growth for a heavy gas layer.PHYSICS OF FLUIDS,37(7),13.
MLA Xu, Zhu,et al."Rarefaction-induced Rayleigh-Taylor growth for a heavy gas layer".PHYSICS OF FLUIDS 37.7(2025):13.

入库方式： OAI收割

来源：力学研究所

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