中国物理B ›› 2022, Vol. 31 ›› Issue (3): 35203-035203.doi: 10.1088/1674-1056/ac3390

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Effect of initial phase on the Rayleigh—Taylor instability of a finite-thickness fluid shell

Hong-Yu Guo(郭宏宇)1,2,†, Tao Cheng(程涛)1,2, Jing Li(李景)3, and Ying-Jun Li(李英骏)1,2,‡   

  1. 1 State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China;
    2 School of Science, China University of Mining and Technology, Beijing 100083, China;
    3 Beijing Aeronautical Technology Research Center, Beijing 100076, China
  • 收稿日期:2021-07-29 修回日期:2021-10-04 接受日期:2021-10-27 出版日期:2022-02-22 发布日期:2022-02-24
  • 通讯作者: Hong-Yu Guo, Ying-Jun Li E-mail:ghy@cumtb.edu.cn;lyj@aphy.iphy.ac.cn
  • 基金资助:
    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2021YQLX05), the National Natural Science Foundation of China (Grant No. 11974419), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDA 25051000).

Effect of initial phase on the Rayleigh—Taylor instability of a finite-thickness fluid shell

Hong-Yu Guo(郭宏宇)1,2,†, Tao Cheng(程涛)1,2, Jing Li(李景)3, and Ying-Jun Li(李英骏)1,2,‡   

  1. 1 State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China;
    2 School of Science, China University of Mining and Technology, Beijing 100083, China;
    3 Beijing Aeronautical Technology Research Center, Beijing 100076, China
  • Received:2021-07-29 Revised:2021-10-04 Accepted:2021-10-27 Online:2022-02-22 Published:2022-02-24
  • Contact: Hong-Yu Guo, Ying-Jun Li E-mail:ghy@cumtb.edu.cn;lyj@aphy.iphy.ac.cn
  • Supported by:
    Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2021YQLX05), the National Natural Science Foundation of China (Grant No. 11974419), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDA 25051000).

摘要: Rayleigh—Taylor instability (RTI) of finite-thickness shell plays an important role in deep understanding the characteristics of shell deformation and material mixing. The RTI of a finite-thickness fluid layer is studied analytically considering an arbitrary perturbation phase difference on the two interfaces of the shell. The third-order weakly nonlinear (WN) solutions for RTI are derived. It is found the main feature (bubble-spike structure) of the interface is not affected by phase difference. However, the positions of bubble and spike are sensitive to the initial phase difference, especially for a thin shell (kd<1), which will be detrimental to the integrity of the shell. Furthermore, the larger phase difference results in much more serious RTI growth, significant shell deformation can be obtained in the WN stage for perturbations with large phase difference. Therefore, it should be considered in applications where the interface coupling and perturbation phase effects are important, such as inertial confinement fusion.

关键词: Rayleigh—Taylor instability, interface coupling effect, inertial confinement fusion

Abstract: Rayleigh—Taylor instability (RTI) of finite-thickness shell plays an important role in deep understanding the characteristics of shell deformation and material mixing. The RTI of a finite-thickness fluid layer is studied analytically considering an arbitrary perturbation phase difference on the two interfaces of the shell. The third-order weakly nonlinear (WN) solutions for RTI are derived. It is found the main feature (bubble-spike structure) of the interface is not affected by phase difference. However, the positions of bubble and spike are sensitive to the initial phase difference, especially for a thin shell (kd<1), which will be detrimental to the integrity of the shell. Furthermore, the larger phase difference results in much more serious RTI growth, significant shell deformation can be obtained in the WN stage for perturbations with large phase difference. Therefore, it should be considered in applications where the interface coupling and perturbation phase effects are important, such as inertial confinement fusion.

Key words: Rayleigh—Taylor instability, interface coupling effect, inertial confinement fusion

中图分类号:  (Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.))

  • 52.57.Fg
47.20.Ma (Interfacial instabilities (e.g., Rayleigh-Taylor)) 52.35.Py (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))