Bubble merger in initial Richtmyer-Meshkov instability on inverse-chevron interface

被引:15
作者
Guo, Xu [1 ]
Zhai, Zhigang [1 ]
Si, Ting [1 ]
Luo, Xisheng [1 ]
机构
[1] Univ Sci & Technol China, Dept Modern Mech, Hefei 230026, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
SINGLE-MODE; NONLINEAR EVOLUTION; ACCELERATION;
D O I
10.1103/PhysRevFluids.4.092001
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We report the shock tube experiments on Richtmyer-Meshkov instability to evaluate the bubble merger effect in initial stages. The initial interface is specially designed by alternatively arranging the major and minor inverse-chevron shapes with different amplitudes and wavelengths such that the bubble merger effect is highlighted. The results show that the major and minor shapes develop independently at very early stages, and after a short transient the bubble merger occurs. The bubble merger promotes the width growth of the major shape while it inhibits the width growth of the minor one. However, the bubble merger has a greater effect on the development of the minor shape than the major one. As the initial size difference between two shapes increases, the bubble merger occurs earlier, and the minor shape is affected more heavily. The developments of bubble front difference seem to experience two different linear stages before it enters a nonlinear stage, and collapse well in dimensionless form for different cases. As a result, the initial size difference has a limited effect on the bubble merger in the streamwise direction. The ratio of the major bubble diameter in spanwise direction to the bubble width increases with time, and does not reach a stable phase because the flow is far from the turbulent mixing region.
引用
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页数:9
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共 35 条
  • [1] SCALE-INVARIANT MIXING RATES OF HYDRODYNAMICALLY UNSTABLE INTERFACES
    ALON, U
    HECHT, J
    MUKAMEL, D
    SHVARTS, D
    [J]. PHYSICAL REVIEW LETTERS, 1994, 72 (18) : 2867 - 2870
  • [2] SCALE-INVARIANT REGIME IN RAYLEIGH-TAYLOR BUBBLE-FRONT DYNAMICS
    ALON, U
    SHVARTS, D
    MUKAMEL, D
    [J]. PHYSICAL REVIEW E, 1993, 48 (02): : 1008 - 1014
  • [3] The Richtmyer-Meshkov instability
    Brouillette, M
    [J]. ANNUAL REVIEW OF FLUID MECHANICS, 2002, 34 : 445 - 468
  • [4] PLIF flow visualization and measurements of the Richtmyer-Meshkov instability of an air/SF6 interface
    Collins, BD
    Jacobs, JW
    [J]. JOURNAL OF FLUID MECHANICS, 2002, 464 (464) : 113 - 136
  • [5] Dependence of turbulent Rayleigh-Taylor instability on initial perturbations
    Dimonte, G
    [J]. PHYSICAL REVIEW E, 2004, 69 (05): : 14
  • [6] Density ratio dependence of Rayleigh-Taylor mixing for sustained and impulsive acceleration histories
    Dimonte, G
    Schneider, M
    [J]. PHYSICS OF FLUIDS, 2000, 12 (02) : 304 - 321
  • [7] Simulations and model of the nonlinear Richtmyer-Meshkov instability
    Dimonte, Guy
    Ramaprabhu, P.
    [J]. PHYSICS OF FLUIDS, 2010, 22 (01)
  • [8] Evolution of a shocked multimode interface with sharp corners
    Guo, Xu
    Ding, Juchun
    Luo, Xisheng
    Zhar, Zhigang
    [J]. PHYSICAL REVIEW FLUIDS, 2018, 3 (11):
  • [9] Experiments on the late-time development of single-mode Richtmyer-Meshkov instability
    Jacobs, JW
    Krivets, VV
    [J]. PHYSICS OF FLUIDS, 2005, 17 (03) : 034105 - 1
  • [10] ON THE INSTABILITY OF SUPERPOSED FLUIDS IN A GRAVITATIONAL FIELD
    LAYZER, D
    [J]. ASTROPHYSICAL JOURNAL, 1955, 122 (01) : 1 - 12