A Decaying Isotropic Turbulence Pursued by the Spectral Method
A Decaying Isotropic Turbulence Pursued by the Spectral Method
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谱法追寻的衰变各向同性湍流
DOI：
10.1143/jpsj.57.1532
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
I. Hosokawa
中科院分区：
文献类型：
--
作者：
Kiyoshi Yamamoto;I. Hosokawa
采用谱方法对雷诺数为50-500的各向同性湍流进行了数值模拟，计算网格数为128 ~ 3个。在充分发展状态下达到的微尺度雷诺数为100。在包含湍流的立方体表面上仅设置周期性边界条件。结果发现了Kolmogorov谱定律和湍流的其他有趣特征，包括在充分发展的湍流中随机分布的间歇性强涡度区域的透视图。
The decaying isotropic turbulence starting with a typical initial energy spectrum was numerically investigated by the spectral method for Reynolds numbers 50–500, using up to 128 3 grid points. The microscale Reynolds number reached at a fully developed state was \({\lesssim}100\). Only the periodic boundary condition was set on the surfaces of the cube which contained the turbulence. As a result, the Kolmogorov spectrum law and other interesting characteristics of the turbulence were found, including the perspective of intermittent strong-vorticity regions randomly distributed in a fully developed turbulence.