Robustness of vortex populations in the two-dimensional inverse energy cascade
Robustness of vortex populations in the two-dimensional inverse energy cascade
复制标题
二维逆能量级联中涡群的鲁棒性
DOI:
10.1017/jfm.2018.473
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发表时间:
2018
影响因子:
3.7
通讯作者:
Burgess B
中科院分区:
文献类型:
--
作者:
Burgess B
We study how the properties of forcing and dissipation affect the scaling behaviour of the vortex population in the two-dimensional turbulent inverse energy cascade. When the flow is forced at scales intermediate between the domain and dissipation scales, the growth rates of the largest vortex area and the spectral peak length scale are robust to all simulation parameters. For white-in-time forcing the number density distribution of vortex areas follows the scaling theory predictions of Burgess & Scott (J. Fluid Mech., vol. 811, 2017, pp. 742–756) and shows little sensitivity either to the forcing bandwidth or to the nature of the small-scale dissipation: both narrowband and broadband forcing generate nearly identical vortex populations, as do Laplacian diffusion and hyperdiffusion. The greatest differences arise in comparing simulations with correlated forcing to those with white-in-time forcing: in flows with correlated forcing the intermediate range in the vortex number density steepens significantly past the predicted scale-invariant . Our results establish coherent vortices as a robust feature of the two-dimensional inverse energy cascade, and provide clues as to the dynamical mechanisms shaping their statistics.
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DOI:
--
发表时间:
2006
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
R.K. Scott
通讯作者:
R.K. Scott
影响因子:
8.9
作者:
Liu Y
通讯作者:
Liu Y
影响因子:
8.6
作者:
CARNEVALE, GF;MCWILLIAMS, JC;YOUNG, WR
通讯作者:
YOUNG, WR
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Lowe;P. Davidson
通讯作者:
P. Davidson
影响因子:
3.7
作者:
A. Vallgren
通讯作者:
A. Vallgren