Evaluation of abrupt energy transfer among turbulent plasma structures using singular value decomposition
Evaluation of abrupt energy transfer among turbulent plasma structures using singular value decomposition
复制标题
使用奇异值分解评估湍流等离子体结构之间的突变能量传递
DOI:
10.1088/1361-6587/abcb46
复制
发表时间:
2020
影响因子:
2.2
通讯作者:
Inagaki S
中科院分区:
文献类型:
--
作者:
Sasaki M;Kobayashi T;Dendy R O;Kawachi Y;Arakawa H;Inagaki S
A method to quantify the energy transfer among turbulent structures using singular value decomposition (SVD) is presented. We apply the method to numerical turbulence data obtained from a global plasma simulation using the Hasegawa–Wakatani fluid model, in which the Kelvin–Helmholtz instability plays a dominant role. Using the SVD method, the electrostatic potential is decomposed into a background potential deformation, a zonal flow, a coherent mode and an intermittent structure. Thus there are four key structures, as distinct from the three found in conventional theory. The kinetic energy of each structure is evaluated, and the limit cycle among them is obtained. In the limit cycle, an abrupt change of the background is found to be synchronised with the period of the zonal flow. The energy transfer function of each turbulence structure, which is defined on the basis of a vorticity equation, is evaluated. This then provides physical understanding of how the limit cycle is sustained by dynamical changes in the energy transfer among structures over the its period. In addition, it is shown that the abrupt deformation of the background is caused by the non-linear self-coupling of the intermittent structure.
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DOI:
10.1088/0741-3335/55/11/115009
发表时间:
2013
期刊:
Plasma Phys. Control. Fusion
影响因子:
--
作者:
R. O. Dendy;S. C. Chapman and S. Inagaki
通讯作者:
S. C. Chapman and S. Inagaki
影响因子:
3.3
作者:
D. Hatch;F. Jenko;A. Navarro;V. Bratanov;P. Terry;M. Pueschel
通讯作者:
M. Pueschel
影响因子:
4.1
作者:
del-Castillo-Negrete, D.;Hirshman, S. P.;D'Azevedo, E. F.
通讯作者:
D'Azevedo, E. F.
影响因子:
2.2
作者:
A. Kaptanoglu;K. Morgan;C. Hansen;S. Brunton
通讯作者:
S. Brunton
DOI:
10.7868/s036729211605005x
发表时间:
2016
期刊:
Phys. Plazmy
影响因子:
--
作者:
K. Itoh;S.-I. Itoh;Y. Kosuga;M. Lesur;and T. Ido
通讯作者:
and T. Ido