Self-similarity and universality in Rayleigh-Taylor, Boussinesq turbulence
Self-similarity and universality in Rayleigh-Taylor, Boussinesq turbulence
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DOI：
10.1063/1.3054152
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发表时间：
2009-01-01
影响因子：
4.6
通讯作者：
Chertkov, Michael
中科院分区：
文献类型：
--
作者：
Vladimirova, Natalia;Chertkov, Michael
我们报告和讨论的Rayleigh-Taylor不稳定性的Boussinesq，不可压缩制度发展到湍流的案例研究模拟。我们的主要重点是对已经发展和增长的尺寸混合区内部的密度和速度波动进行统计分析。文章中报告的新观察结果涉及混合区快照内部速度和密度波动谱的自相似性、水平切片水平谱的独立性以及表现为实际独立于混合区内部结构的普遍性（以重新缩放的空间单位测量），初始界面扰动。(C)2009年美国物理学会。[DOI：10.1063/1.3054152]
We report and discuss case study simulations of the Rayleigh-Taylor instability in the Boussinesq, incompressible regime developed to turbulence. Our main focus is on a statistical analysis of density and velocity fluctuations inside of the already developed and growing in size mixing zone. Novel observations reported in the article concern self-similarity of the velocity and density fluctuations spectra inside of the mixing zone snapshot, independence of the spectra of the horizontal slice level, and universality showing itself in a virtual independence of the internal structure of the mixing zone, measured in the rescaled spatial units, of the initial interface perturbations. (C) 2009 American Institute of Physics. [DOI:10.1063/1.3054152]