Experimental study on Richtmyer-Meshkov instability at a light-heavy interface over a wide range of Atwood numbers

doi:10.1017/jfm.2023.869

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Experimental study on Richtmyer-Meshkov instability at a light-heavy interface over a wide range of Atwood numbers
	Chen, Chenren 2; Xing, Yinuo 2; Wang, He 2; Zhai, Zhigang 2; Luo, Xisheng 1,2
刊名	JOURNAL OF FLUID MECHANICS
	2023-11-22
卷号	975 页码:21
关键词	shock waves
ISSN号	0022-1120
DOI	10.1017/jfm.2023.869
通讯作者	Wang, He(ustchewang@ustc.edu.cn) ; Luo, Xisheng(xsluo@imech.ac.cn)
英文摘要	Richtmyer-Meshkov instability (RMI) at a light-heavy single-mode interface over a wide range of post-shock Atwood numbers A(1) is studied systematically through elaborate experiments. The interface generation and A(1) variation are achieved by the soap-film technology and gas-layer scheme, respectively. Qualitatively, the nonlinear interface evolution features, including spike, bubble and roll-up structures, are more significant in RMI with higher A1. Quantitatively, both the impulsive model and an analytical linear model perform well in predicting the linear growth rate under a wide range of A(1) conditions. For the weakly nonlinear stage, the significant spike acceleration occurring when A(1) is high, which is observed experimentally for the first time, results in the evolution law of RMI with high A(1) being different from the counterpart with low or intermediate A(1). None of the considered nonlinear models is found to be applicable for RMI under all A(1) conditions, and the predictive capabilities of these models are analysed and summarized. Based on the present experimental results, an empirical nonlinear model is proposed for RMI over a wide range of A(1). Further, modal analysis shows that in RMI with high (low or intermediate) A(1), high-order harmonics evolve rapidly (slowly) and cannot (can) be ignored. Accordingly, for RMI with high (low or intermediate) A(1), the modal model proposed by Zhang & Sohn (Phys. Fluids, vol. 9, 1997, pp. 1106-1124) is less (more) accurate than the one proposed by Vandenboomgaerde et al. (Phys. Fluids, vol. 14, 2002, pp. 1111-1122), since the former ignores perturbation solutions higher than fourth order (the latter retains only terms with the highest power in time).
WOS关键词	INERTIAL-CONFINEMENT FUSION ; SINGLE-MODE ; SHOCK ; EVOLUTION ; TAYLOR ; GROWTH
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001105762500001
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93484]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Wang, He; Luo, Xisheng
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	Chen, Chenren,Xing, Yinuo,Wang, He,et al. Experimental study on Richtmyer-Meshkov instability at a light-heavy interface over a wide range of Atwood numbers[J]. JOURNAL OF FLUID MECHANICS,2023,975:21.
APA	Chen, Chenren,Xing, Yinuo,Wang, He,Zhai, Zhigang,&Luo, Xisheng.(2023).Experimental study on Richtmyer-Meshkov instability at a light-heavy interface over a wide range of Atwood numbers.JOURNAL OF FLUID MECHANICS,975,21.
MLA	Chen, Chenren,et al."Experimental study on Richtmyer-Meshkov instability at a light-heavy interface over a wide range of Atwood numbers".JOURNAL OF FLUID MECHANICS 975(2023):21.