Prograde vortices, internal shear layers and the Taylor microscale in high-Reynolds-number turbulent boundary layers
Prograde vortices, internal shear layers and the Taylor microscale in high-Reynolds-number turbulent boundary layers
复制标题
高雷诺数湍流边界层中的顺行涡流、内部剪切层和泰勒微尺度
DOI:
10.1017/jfm.2021.478
复制
发表时间:
2021
影响因子:
3.7
通讯作者:
Guala, Michele
中科院分区:
文献类型:
--
作者:
Heisel, Michael;de Silva, Charitha M.;Hutchins, Nicholas;Marusic, Ivan;Guala, Michele
The statistical properties of prograde spanwise vortex cores and internal shear layers (ISLs) are evaluated for a series of high-Reynolds-number turbulent boundary layers. The considered flows span a wide range of both Reynolds number and surface roughness. In each case, the largest spanwise vortex cores in the outer layer of the boundary layer have size comparable to the Taylor microscale . The same scaling parameters describe the average thickness and velocity difference across the ISLs. The results demonstrate the importance of the local large-eddy turnover time in determining the strain rate confining the size of the vortex cores and shear layers. The relevance of the turnover time, and more generally the Taylor microscale, can be explained by a stretching mechanism involving the mutual interaction of coherent velocity structures such as uniform momentum zones with the evolving shear layers separating the structures.
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影响因子:
3.7
作者:
J. Klewicki
通讯作者:
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DOI:
10.1016/j.ijheatfluidflow.2021.108817
发表时间:
2021-08
影响因子:
2.6
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Xue Chen;Yongmann M. Chung;M. Wan
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通讯作者:
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
M. Holzner;M. Guala;B. Luthi;Alexander Liberzon;N. Nikitin;W. Kinzelbach;A. Tsinober
通讯作者:
A. Tsinober
DOI:
10.1103/physrevfluids.5.104605
发表时间:
2020-10
期刊:
--
影响因子:
--
作者:
M. Heisel;G. Katul;M. Chamecki;M. Guala
通讯作者:
M. Heisel;G. Katul;M. Chamecki;M. Guala