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Nonlinear simulation and energy analysis of the EAST coherent mode

文献类型：期刊论文

作者Huang, Y. Q.2,3,4; Xia, T. Y.2,4; Xu, X. Q.5; Kong, D. F.2,4; Wang, Y. M.2,4; Ye, Y.2,4; Qian, Z. H.2,3,4; Zang, Q.2,4; Wu, M. P.2,3,4; Chu, Y. Q.2,4
刊名NUCLEAR FUSION
出版日期2020-02-01
卷号60
关键词coherent mode energy transfer bispectral analysis relative phase kinetic and magnetic energy
ISSN号0029-5515
DOI10.1088/1741-4326/ab5e73
通讯作者Xia, T. Y.(xiaty@ipp.ac.cn)
英文摘要The EAST coherent modes (CMs) during the inter-ELM phase are simulated by the electromagnetic six-field two-fluid module in BOUT++ framework. The fluctuation level of the electrostatic potential, electron pressure and density perturbations are comparable to the experiments, and the simulated electrostatic perturbation is around two orders of magnitude larger than the magnetic one in EAST CM. The frequency and poloidal wave number are consistent with experiments in the simulations of EAST CM equilibriums. The energy transfer between three-wave coupling indicates that the energy tends to transfer from medium-n to low-n modes in the early nonlinear phase, and the modes coupling effect in the nonlinear saturation phase is larger than that in the early nonlinear phase. Both the energy transfer and bispectral analysis show that the N-i fluctuation tends to generate the 'single-mode' coupling and T-e tends to be 'multiple-mode', which indicates that the collapse of the density profile is larger than the electron temperature. The relative phase analysis is applied to evaluate whether the turbulence can extract the energy from density and temperature profiles. The result indicates that the density profile provides much more energy to drive the turbulence than electron temperature. The kinetic and magnetic energy transfer rates are used to understand the instability and turbulence driving mechanisms of the EAST CM. In the linear phase of the nonlinear simulation, the instability is driven by the peeling-ballooning mode and drift-Alfven wave (DAW), and the radial electric field and shear Alfven wave have large suppressing effects. The turbulence of EAST CM is a predominantly electrostatic mode, which corresponds to the Reynolds stress seven times larger than Maxwell stress. In addition, the effect of the electrostatic part in DAW is much larger than the electromagnetic one.
WOS关键词DIGITAL BISPECTRAL ANALYSIS ; TURBULENCE ; PEDESTAL
资助项目National Key R&D Program of China[2017YFE0301100] ; National Key R&D Program of China[2017YFE0301101] ; National Key R&D Program of China[2014GB106001] ; China Natural Science Foundation[11675217] ; China Natural Science Foundation[1105236] ; Youth Innovation Promotion Association Chinese Academy of Sciences[2017479] ; K C Wong Education Foundation
WOS研究方向Physics
语种英语
WOS记录号WOS:000520149100001
出版者IOP PUBLISHING LTD
资助机构National Key R&D Program of China ; China Natural Science Foundation ; Youth Innovation Promotion Association Chinese Academy of Sciences ; K C Wong Education Foundation
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/103747]  
专题中国科学院合肥物质科学研究院
通讯作者Xia, T. Y.
作者单位1.Hengyang Normal Univ, Hengyang, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China
3.Univ Sci & Technol China, Hefei, Peoples R China
4.Chinese Acad Sci, China Ctr Magnet Fus Theory, Hefei, Peoples R China
5.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
推荐引用方式
GB/T 7714		 Huang, Y. Q.,Xia, T. Y.,Xu, X. Q.,et al. Nonlinear simulation and energy analysis of the EAST coherent mode[J]. NUCLEAR FUSION,2020,60.
APA Huang, Y. Q..,Xia, T. Y..,Xu, X. Q..,Kong, D. F..,Wang, Y. M..,...&Zhang, D. Z..(2020).Nonlinear simulation and energy analysis of the EAST coherent mode.NUCLEAR FUSION,60.
MLA Huang, Y. Q.,et al."Nonlinear simulation and energy analysis of the EAST coherent mode".NUCLEAR FUSION 60(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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