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

文献类型：期刊论文

作者Guo, Xu; Xu, Zhu; Zhai ZG(翟志刚)
刊名PHYSICS OF FLUIDS
出版日期2025-09-01
卷号37期号:9页码:13
ISSN号1070-6631
DOI10.1063/5.0289113
通讯作者Zhai, Zhigang()
英文摘要The Rayleigh-Taylor (RT) interface evolution within a light fluid layer subjected to rarefaction-driven flows is investigated through rarefaction-tube experiments and numerical simulations, with focus on initial condition effects. Rarefaction-induced acceleration yields distinct RT instability responses at the two interfaces: the upstream interface (I1) becomes RT-unstable while the downstream interface (I2) remains RT-stable. This contrast drives interface coupling that reduces perturbation growth for in-phase configurations but weakly suppresses or promotes growth for anti-phase configurations. To resolve these distinct behaviors, Mikaelian's linear model [Phys. Fluids, 7, 888-890 (1995)] is modified through incorporating a phase correction factor. The modified model accurately predicts linear amplitude evolution for both interfaces across layer widths, with validity further confirmed through comparison with prior heavy fluid layer results. Increasing I2's initial amplitude or reducing layer width modulates I1 growth, suppressing it for in-phase cases while amplifying it for anti-phase cases, where layer width reduction proves more effective. A higher Atwood number at I2 intensifies the reflected rarefaction wave, thereby reducing I1 growth; however, it simultaneously enhances interface coupling, enlarging the growth disparity at I1 between in-phase and anti-phase configurations. These findings provide insights for manipulating perturbation growth through tailored initial conditions.
分类号一类/力学重要期刊
WOS关键词RICHTMYER-MESHKOV INSTABILITIES ; SHOCK ; DRIVEN ; FLUIDS
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
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:001572717500018
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
其他责任者翟志刚
源URL[http://dspace.imech.ac.cn/handle/311007/103916]  
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Univ Sci & Technol China, Sch Engn Sci, State Key Lab High Temp Gas Dynam, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Xu,Xu, Zhu,Zhai ZG. Rarefaction-induced Rayleigh-Taylor growth for a light gas layer[J]. PHYSICS OF FLUIDS,2025,37(9):13.
APA Guo, Xu,Xu, Zhu,&翟志刚.(2025).Rarefaction-induced Rayleigh-Taylor growth for a light gas layer.PHYSICS OF FLUIDS,37(9),13.
MLA Guo, Xu,et al."Rarefaction-induced Rayleigh-Taylor growth for a light gas layer".PHYSICS OF FLUIDS 37.9(2025):13.

入库方式： OAI收割

来源：力学研究所

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