Effective drift velocity from turbulent transport by vorticity
Effective drift velocity from turbulent transport by vorticity
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涡流引起的湍流传输的有效漂移速度
DOI:
10.1103/physrevfluids.7.104601
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发表时间:
2022
影响因子:
2.7
通讯作者:
Shang, Jessica K.
中科院分区:
文献类型:
--
作者:
Aluie, Hussein;Rai, Shikhar;Yin, Hao;Lees, Aarne;Zhao, Dongxiao;Griffies, Stephen M.;Adcroft, Alistair;Shang, Jessica K.
We highlight the differing roles of vorticity and strain in the transport of coarse-grained scalars at length scales larger thanby smaller scale (subscale) turbulence. We use the first term in a multiscale gradient expansion due to Eyink [J. Fluid Mech. 549, 159 (2006)0022-112010.1017/S0022112005007895], which exhibits excellent correlation with the exact subscale physics when the partitioning lengthis any scale smaller than that of the spectral peak. We show that unlike subscale strain, which acts as an anisotropic diffusion/antidiffusion tensor, subscale vorticity's contribution is solely a conservative advection of coarse-grained quantities by an eddy-induced nondivergent velocity,, that is proportional to the curl of vorticity. Therefore, material (Lagrangian) advection of coarse-grained quantities is accomplished not by the coarse-grained flow velocity,, but by the effective velocity,, the physics of which may improve commonly used LES models.
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影响因子:
3.5
作者:
Aluie, Hussein;Hecht, Matthew;Vallis, Geoffrey K.
通讯作者:
Vallis, Geoffrey K.
影响因子:
1.9
作者:
A. Lees;H. Aluie
通讯作者:
A. Lees;H. Aluie
影响因子:
6.8
作者:
S. Griffies;A. Adcroft;R. Hallberg
通讯作者:
R. Hallberg
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
F. Bouchet
通讯作者:
F. Bouchet
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
C. Higgins;M. Parlange;C. Meneveau
通讯作者:
C. Meneveau