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

doi:10.1017/jfm.2023.869

	Experimental study on Richtmyer-Meshkov instability at a light-heavy interface over a wide range of Atwood numbers
	Chen, Chenren; Xing, Yinuo; Wang, He; Zhai, Zhigang; Luo XS(罗喜胜)
通讯作者	Wang, He(ustchewang@ustc.edu.cn) ; Luo, Xisheng(xsluo@imech.ac.cn)
发表期刊	JOURNAL OF FLUID MECHANICS
	2023-11-22
卷号	975 页码:21
ISSN	0022-1120
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).
关键词	shock waves
DOI	10.1017/jfm.2023.869
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001105762500001
关键词[WOS]	INERTIAL-CONFINEMENT FUSION ; SINGLE-MODE ; SHOCK ; EVOLUTION ; TAYLOR ; GROWTH
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Wang, He ; Luo, Xisheng
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/93485
专题	高温气体动力学国家重点实验室
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,&罗喜胜.(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.

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