Simulations of Richtmyer–Meshkov instabilities in planar shock-tube experiments
Simulations of Richtmyer–Meshkov instabilities in planar shock-tube experiments
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DOI：
10.1063/1.3555635
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发表时间：
2011-03
影响因子：
4.6
通讯作者：
F. Grinstein;A. Gowardhan;A. Wachtor
中科院分区：
文献类型：
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作者：
F. Grinstein;A. Gowardhan;A. Wachtor
在大涡模拟（LES）方法中，大尺度含能结构被解决，较小的结构被过滤掉，未解决的亚网格效应被建模。最近大量的工作表明，预测欠解析模拟湍流中的速度场是可能的，而不诉诸显式亚网格模型时，使用一类物理捕获高分辨率有限体积数值算法。这种策略被表示为隐式LES（ILES）。从规范到复杂流的基本应用测试表明，ILES在LES领域的大规模特征驱动的适当流中与传统LES具有竞争力。ILES的性能在基本上更困难的问题，欠分辨的速度场和初始条件驱动的欠分辨材料混合是目前工作的重点。在解决相关的分辨率问题的研究进展，在平面sho里希特迈尔-梅什科夫不稳定性驱动的混合…
In the large eddy simulation (LES) approach, large-scale energy-containing structures are resolved, smaller structures are filtered out, and unresolved subgrid effects are modeled. Extensive recent work has demonstrated that predictive under-resolved simulations of the velocity fields in turbulent flows are possible without resorting to explicit subgrid models when using a class of physics-capturing high-resolution finite-volume numerical algorithms. This strategy is denoted as implicit LES (ILES). Tests in fundamental applications ranging from canonical to complex flows indicate that ILES is competitive with conventional LES in the LES realm proper—flows driven by large-scale features. The performance of ILES in the substantially more difficult problem of under-resolved material mixing driven by under-resolved velocity fields and initial conditions is a focus of the present work. Progress in addressing relevant resolution issues in studies of mixing driven by Richtmyer–Meshkov instabilities in planar sho...