Two-dimensional isotropic inertia–gravity wave turbulence
Two-dimensional isotropic inertia–gravity wave turbulence
复制标题
二维各向同性惯性-重力波湍流
DOI:
10.1017/jfm.2019.406
复制
发表时间:
2019
影响因子:
3.7
通讯作者:
Bühler, Oliver
中科院分区:
文献类型:
--
作者:
Xie, Jin-Han;Bühler, Oliver
We present an idealized study of rotating stratified wave turbulence in a two-dimensional vertical slice model of the Boussinesq equations, focusing on the peculiar case of equal Coriolis and buoyancy frequencies. In this case the fully nonlinear fluid dynamics can be shown to be isotropic in the vertical plane, which allows the classical methods of isotropic turbulence to be applied. Contrary to ordinary two-dimensional turbulence, here a robust downscale flux of total energy is observed in numerical simulations that span the full parameter regime between Ozmidov and forcing scales. Notably, this robust downscale flux of the total energy does not hold separately for its various kinetic and potential components, which can exhibit both upscale and downscale fluxes, depending on the parameter regime. Using a suitable extension of the classical Kármán–Howarth–Monin equation, exact expressions that link third-order structure functions and the spectral energy flux are derived and tested against numerical results. These expressions make obvious that even though the total energy is robustly transferred downscale, the third-order structure functions are sign indefinite, which illustrates that the sign and the form of measured third-order structure functions are both crucially important in determining the direction of the spectral energy transfer.
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DOI:
10.1209/0295-5075/112/49001
发表时间:
2015
期刊:
Europhysics Letters
影响因子:
--
作者:
R. Marino;D. Rosenberg;C. Herbert;A. Pouquet
通讯作者:
A. Pouquet
DOI:
--
发表时间:
1999
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
--
作者:
D. Bernard
通讯作者:
D. Bernard
DOI:
10.1103/physreve.90.023005
发表时间:
2014
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
E. Deusebio;G. Boffetta;E. Lindborg;S. Musacchio
通讯作者:
S. Musacchio
影响因子:
3.7
作者:
E. Lindborg
通讯作者:
E. Lindborg
影响因子:
2.4
作者:
K. Seshasayanan;A. Alexakis
通讯作者:
A. Alexakis