Hierarchical vortical structures extracted from turbulent fields
Hierarchical vortical structures extracted from turbulent fields
复制标题
从湍流场中提取的分层涡旋结构
DOI:
10.1088/1873-7005/ab53b1
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发表时间:
2019
影响因子:
1.5
通讯作者:
Yu Fukunishi
中科院分区:
文献类型:
--
作者:
Masato Hirota;Yu Nishio;Seiichiro Izawa;Yu Fukunishi
Geometrical relationships and interactions among hierarchical structures in isotropic turbulence are investigated by identifying individual vortices of three different scales in the inertial subrange. Fourier bandpass filters are employed to extract the vortices, and each extracted vortex is replaced by a group of vortex segments with a cylindrical shape. The axes of neighboring vortices tend to be anti-parallel when the distance between them is equivalent to their diameter. Further, results indicate that a vortex is most strongly stretched by vortices twice the scale irrespective of the Reynolds number and the vortex scales. Then, the geometric relationships between the vortices being stretched and those that cause the stretching are analyzed, and the stretching is found to be particularly strong when the two vortices are orthogonal to each other.
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DOI:
10.1007/1-4020-4181-0_11
发表时间:
2006
期刊:
--
影响因子:
--
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