| Statistical characteristics of turbulent mixing in spherical and cylindrical converging Richtmyer-Meshkov instabilities | |
Li XL(李新亮)1,2 ; Fu YW(符耀威)1,2; Yu ZP(于长平)1,2; Li, Li3
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| Corresponding Author | Yu, Changping([email protected]) ; Li, Li([email protected]) |
| Source Publication | JOURNAL OF FLUID MECHANICS
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| 2021-10-04 | |
| Volume | 928Pages:32 |
| ISSN | 0022-1120 |
| Abstract | In this paper, the Richtmyer-Meshkov instabilities in spherical and cylindrical converging geometries with a Mach number of approximately 1.5 are investigated by using the high resolution implicit large eddy simulation method, and the influence of the geometric effect on the turbulent mixing is investigated. The heavy fluid is sulphur hexafluoride (SF6), and the light fluid is nitrogen (N2). The shock wave converges from the heavy fluid into the light fluid. The Atwood number is 0.678. The total structured and uniform Cartesian grid node number in the main computational domain is 2048(3). In addition, to avoid the influence of boundary reflection, a sufficiently long sponge layer with 50 non-uniform coarse grids is added for each non-periodic boundary. Present numerical simulations have high and nonlinear initial perturbation levels, which rapidly lead to turbulent mixing in the mixing layers. Firstly, some physical-variable mean profiles, including mass fraction, Taylor Reynolds number, turbulent kinetic energy, enstrophy and helicity, are provided. Second, the mixing characteristics in the spherical and cylindrical turbulent mixing layers are investigated, such as molecular mixing fraction, efficiency Atwood number, turbulent mass-flux velocity and density self-correlation. Then, Reynolds stress and anisotropy are also investigated. Finally, the radial velocity, velocity divergence and enstrophy in the spherical and cylindrical turbulent mixing layers are studied using the method of conditional statistical analysis. Present numerical results show that the geometric effect has a great influence on the converging Richtmyer-Meshkov instability mixing layers. |
| Keyword | compressible turbulence shock waves turbulent mixing |
| DOI | 10.1017/jfm.2021.818 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000721237800001 |
| WOS Keyword | RAYLEIGH-TAYLOR ; NUMERICAL-SIMULATION ; INTERFACE ; DRIVEN ; LAYER ; TRANSITION |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Key Research and Development Program of China[2019YFA0405300] ; National Key Research and Development Program of China[2016YFA0401200] ; NSFC Projects[91852203] ; NSFC Projects[12072349] ; Science Challenge Project[TZ2016001] ; National Numerical Wind Tunnel Project |
| Funding Organization | National Key Research and Development Program of China ; NSFC Projects ; Science Challenge Project ; National Numerical Wind Tunnel Project |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Yu, Changping ; Li, Li |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/88000 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China |
| Recommended Citation GB/T 7714 | Li XL,Fu YW,Yu ZP,et al. Statistical characteristics of turbulent mixing in spherical and cylindrical converging Richtmyer-Meshkov instabilities[J]. JOURNAL OF FLUID MECHANICS,2021,928:32.Rp_Au:Yu, Changping, Li, Li |
| APA | 李新亮,符耀威,于长平,&Li, Li.(2021).Statistical characteristics of turbulent mixing in spherical and cylindrical converging Richtmyer-Meshkov instabilities.JOURNAL OF FLUID MECHANICS,928,32. |
| MLA | 李新亮,et al."Statistical characteristics of turbulent mixing in spherical and cylindrical converging Richtmyer-Meshkov instabilities".JOURNAL OF FLUID MECHANICS 928(2021):32. |
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