Richtmyer-Meshkov instability-induced mixing: initial conditions modeling, three-dimensional simulations and comparisons to experiment
Richtmyer-Meshkov instability-induced mixing: initial conditions modeling, three-dimensional simulations and comparisons to experiment
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Richtmyer-Meshkov 不稳定引起的混合：初始条件建模、三维模拟以及与实验的比较
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
W. Don
中科院分区：
文献类型：
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作者：
M. Latini;O. Schilling;W. Don
使用三维九阶加权本质上非振荡模拟研究了再冲击多模 Richtmyer-Meshkov 不稳定性中的湍流传输和混合。使用叠加随机噪声的双模初始扰动对马赫 1.5 空气/SF{sub 6} Vetter-Sturtevant [1] 实验进行建模。质量分数等值面和密度截面显示了再冲击之前、期间和之后的详细结构。使用斜压熵产生、浮力产生和剪切产生项来量化再冲击的影响。混合层生长与实验生长速率非常吻合。再冲击后的增长与 Mikaelian 再冲击模型非常一致 [2]。
Turbulent transport and mixing in the reshocked multi-mode Richtmyer-Meshkov instability is investigated using three-dimensional ninth-order weighted essentially non-oscillatory simulations. A two-mode initial perturbation with superposed random noise is used to model the Mach 1.5 air/SF{sub 6} Vetter-Sturtevant [1] experiment. The mass fraction isosurfaces and density cross-sections show the detailed structure before, during, and after reshock. The effects of reshock are quantified using the baroclinic enstrophy production, buoyancy production, and shear production terms. The mixing layer growth agrees well with the experimental growth rate. The post-reshock growth is in good agreement with the Mikaelian reshock model [2].