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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Anelastic Rayleigh-Taylor mixing layers
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Anelastic Rayleigh-Taylor mixing layers

机译：非弹性瑞利泰勒混合层

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摘要

Anelastic Rayleigh-Taylor mixing layers for miscible fluids are investigated with a recently built model (Schneider and Gauthier 2015 J. Eng. Math. 92 55-71). Four Chebyshev-Fourier-Fourier direct numerical simulations are analyzed. They use different values for the compressibility parameters: Atwood number (the dimensionless difference of the heavy and light fluid densities) and stratification (accounts for the vertical variation of density due to gravity). For intermediate Atwood numbers and finite stratification, compressibility effects quickly occurs. As a result only nonlinear behaviours are reached. The influence of the compressibility parameters on the growth speed of the RTI is discussed. The 0.1-Atwood number/0.4-stratification configuration reaches a turbulent regime. This turbulent mixing layer is analyzed with statistical tools such as moments, PDFs, anisotropy indicators and spectra.
机译：使用最近建立的模型研究了可混溶流体的非弹性Rayleigh-Taylor混合层（Schneider和Gauthier 2015 J. Eng。Math。92 55-71）。分析了四个Chebyshev-Fourier-Fourier直接数值模拟。对于可压缩性参数，它们使用不同的值：阿特伍德数（重流体密度和轻流体密度的无量纲差异）和分层（考虑重力引起的密度的垂直变化）。对于中间的阿特伍德数和有限的分层，可压缩性效应会很快发生。结果，仅达到非线性行为。讨论了可压缩性参数对RTI生长速度的影响。 0.1阿特伍德数/0.4分层构造达到了湍流状态。使用统计工具（例如弯矩，PDF，各向异性指示符和光谱）分析该湍流混合层。

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