Anisotropic evolutions of the magnetohydrodynamic Richtmyer-Meshkov instability induced by a converging shock

doi:10.1103/PhysRevE.108.055201

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Anisotropic evolutions of the magnetohydrodynamic Richtmyer-Meshkov instability induced by a converging shock
	Qin, Jianhua 3; Dong, Guodan 1,2
刊名	PHYSICAL REVIEW E
	2023-11-01
卷号	108 期号:5 页码:12
ISSN号	2470-0045
DOI	10.1103/PhysRevE.108.055201
通讯作者	Dong, Guodan(dongguodan@imech.ac.cn)
英文摘要	The investigation of the converging shock-induced Richtmyer-Meshkov instability, which arises from the interaction of converging shocks with the interface between materials of differing densities in cylindrical capsules, is of significant importance in the field of inertial confinement fusion (ICF). The use of converging shocks, which exhibit higher efficiency than planar shocks in the development of the RMI due to the Bell-Plesset effects, is particularly relevant to energy production in the ICF. Moreover, external magnetic fields are often utilized to mitigate the development of the RMI. This paper presents a systematic investigation of the anisotropic nature of the Richtmyer-Meshkov instability in magnetohydrodynamic induced by the interaction between converging shocks and perturbed semicylindrical density interfaces (DI) based on numerical simulations using Athena++. The results reveal that magnetic fields with beta = 1000, 100, and 10 (beta is defined as the ratio of the plasma pressure to the magnetic pressure) lead to an anisotropic intensification of magnetic fields, anisotropic accelerations of various shock waves [including the converging incident shock (CIS), transmitted shock (TS), and reflected shock (RS)], and anisotropic growth of the DI with subsequent anisotropic vorticity distribution. Upon closer inspection, it becomes evident that these phenomena are strongly interconnected. In particular, the region where the wave front of the CIS impacts the middle point of semicylindrical DI, where the magnetic field is more perpendicular to the fluid motion, experiences a more significant amplification of the magnetic fields. This generates higher-pressure jumps, which in turn accelerates the shock wave near this region. Furthermore, the anisotropic amplification of the magnetic fields reduces the movement of the RMI near the middle point of semicylindrical DI and leads to the anisotropic formation of RMI-induced bubbles and spikes, as well as vortices. By examining vorticity distributions, the results underscore the crucial role of magnetic tension forces in inhibiting fluid rotation.
资助项目	National Natural Science Foundation of China[12202456] ; National Natural Science Foundation of China[12072162] ; Fundamental Research Funds for the Central Universities[AE89991/383] ; China Postdoctoral Science Foundation[2021M693241]
WOS关键词	RAYLEIGH-TAYLOR ; ALFVENIC WAVES ; IGNITION ; POWER
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:001101581700003
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93505]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Dong, Guodan
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 3.Nanjing Univ Sci & Technol, Interdisciplinary Ctr Fundamental & Frontier Sci, Jiangyin 214443, Peoples R China
推荐引用方式 GB/T 7714	Qin, Jianhua,Dong, Guodan. Anisotropic evolutions of the magnetohydrodynamic Richtmyer-Meshkov instability induced by a converging shock[J]. PHYSICAL REVIEW E,2023,108(5):12.
APA	Qin, Jianhua,&Dong, Guodan.(2023).Anisotropic evolutions of the magnetohydrodynamic Richtmyer-Meshkov instability induced by a converging shock.PHYSICAL REVIEW E,108(5),12.
MLA	Qin, Jianhua,et al."Anisotropic evolutions of the magnetohydrodynamic Richtmyer-Meshkov instability induced by a converging shock".PHYSICAL REVIEW E 108.5(2023):12.