托卡马克边缘湍流中带状流的负粘滞阻尼

doi:10.16568/j.0254-6086.201702001

核聚变与等离子体物理 ›› 2017, Vol. 37 ›› Issue (2): 125-130.DOI: 10.16568/j.0254-6086.201702001

• 等离子体物理学 • 下一篇

托卡马克边缘湍流中带状流的负粘滞阻尼

胡世林1，李继全1, 2

(1. 核工业西南物理研究院，成都 610041；2. 京都大学，日本京都 611-0011)

收稿日期:2016-05-09 修回日期:2017-03-02 出版日期:2017-06-15 发布日期:2017-06-14
作者简介:胡世林(1984-)，女，河北邯郸人，博士，助理研究员，从事等离子体理论的数值模拟。
基金资助:
国家磁约束核聚变能发展研究专项(2015GB104004)；国家国际科技合作专项(2015DFA61760)；日本科学研究经费助成事业(26400531)

Negative viscosity damping of zonal flows in tokamak edge turbulence

HU Shi-lin1, LI Ji-quan1, 2

(1. Southwestern Institute of Physics, Chengdu 610041; 2. Kyoto University, Kyoto, Japan 611-0011)

Received:2016-05-09 Revised:2017-03-02 Online:2017-06-15 Published:2017-06-14

摘要/Abstract

摘要：

基于Hasegawa-Wakatani湍流模型，数值模拟了托卡马克边缘等离子体中漂移波湍流和相关的反常粒子输运。从等离子体动量守恒方程出发导出了不采用常规的布辛涅斯克近似的带状流方程，论证了大振幅密度扰动和湍性粒子流对激发带状流的贡献可等效地对应于低阶负粘滞阻尼效果。数值模拟表明，大振幅密度扰动的非线性大大增强了带状流饱和振幅，从而有效抑制了湍性粒子输运。研究结果阐明了托卡马克边缘等离子体大振幅密度扰动的非线性对驱动等离子体旋转、动量输运和带状流的重要性。

关键词: 负粘滞阻尼, 带状流, 布辛涅斯克近似, Hasegawa-Wakatani湍流模型, 密度扰动, 托卡马克边缘湍流

Abstract:

Drift wave turbulence and associated particle transport are simulated based on Hasegawa- Wakatani turbulence model in tokamak edge plasmas. A zonal flow equation without assuming conventional Boussinesq approximation is derived from the plasma momentum conservation. Meanwhile, it is justified that the contribution of the large-amplitude density fluctuation as well as the turbulent particle flux to the zonal flow dynamics may be effectively equivalent to a low-order negative viscosity damping. Simulations show that the nonlinearity of large-amplitude density fluctuation can greatly enhance the zonal flow saturated amplitude, so that turbulent particle transport is dramatically suppressed. The results elucidate the importance of the nonlinearity of large-amplitude density fluctuation in driving plasma rotation, momentum transport and zonal flow generation in tokamak edge plasmas.

Key words: Negative viscosity damping, Zonal flow, Boussinesq approximation, Hasegawa-Wakatani turbulence model, Density fluctuation, Tokamak edge turbulence

中图分类号:

O534
TP311

胡世林1，李继全1, 2. 托卡马克边缘湍流中带状流的负粘滞阻尼[J]. 核聚变与等离子体物理, 2017, 37(2): 125-130.

HU Shi-lin1, LI Ji-quan1, 2. Negative viscosity damping of zonal flows in tokamak edge turbulence[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2017, 37(2): 125-130.

参考文献

[1] Diamond P H, Itoh S-I, Itoh K, et al. Zonal flows in plasma—a review [J]. Plasma Phys. Contr. Fusion, 2005, 47: R35.

[2] Fujisawa A. A review of zonal flow experiments [J]. Nucl. Fusion, 2009, 49: 013001.

[3] Lin Z, Hahm T S, Lee W W, et al. Turbulent transport reduction by zonal flows: massively parallel simulations [J]. Science, 1998, 281: 1835.

[4] Hasegawa A, Mima K. Stationary Spectrum of strong turbulence in magnetized nonuniform plasma [J]. Phys. Rev. Lett., 1977, 39: 205.

[5] Hasegawa A, Wakatani M. Plasma edge turbulence [J]. Phys. Rev. Lett., 1983, 50: 682.

[6] Han J, Tryggvason G. Secondary breakup of axisymmetric liquid drops. I. Acceleration by a constant body force [J]. Phys. Fluids, 1999, 11: 3650.

[7] Yu G Q, Krasheninnikov S I, Guzdar P N. Two- dimensional modelling of blob dynamics in tokamak edge plasmas [J]. Phys. Plasmas, 2006, 13: 042508.

[8] Angus J R, Krasheninnikov S I. Inviscid evolution of large amplitude filaments in a uniform gravity field [J]. Phys. Plasmas, 2014, 21: 112504.

[9] Myra J R, Russell D A, D’ Ippolito D A. Transport of perpendicular edge momentum by drift-interchange turbulence and blobs [J]. Phys. Plasmas, 2008, 15: 032304.

[10] Aydemir A Y. Convective transport in the scrape-off layer of tokamaks [J]. Phys. Plasmas, 2005, 12: 062503.

[11] D’ Ippolito D A, Myra R, Zweben S J. Convective transport by intermittent blob-filaments: Comparison of theory and experiment [J]. Phys. Plasmas, 2011, 18: 060501.

[12] Bodi K, Ciraolo G, GhendrihPh, et al. Impact of the Boussinesq approximation in tokamak scrape-off layer turbulence [C]. 38th EPS Conference on Plasma Physics, 2011, P1.121.

[13] Li Jiquan, Kishimoto Y. Numerical study of zonal flow dynamics and electron transport in electron temperature gradient driven turbulence [J]. Phys. Plasmas, 2004, 11: 1493.

[14] Diamond P H, Mcdevitt C J, Gürcan D, et al. Physics of non-diffusive turbulent transport of momentum and the origins of spontaneous rotation in tokamaks [J]. Nucl. Fusion, 2009, 49: 045002.

[15] Leconte M, Diamond P H. Effect of resonant magnetic perturbations on secondary structures in drift-wave turbulence [J]. Phys. Plasmas, 2011, 18: 082309.

[16] HU Shilin, Li Jiquan, Qu Hongpeng, et al. Spatial localization of resistive drift wave structure in tokamak edge plasmas with anembedded magnetic island [J]. Phys. Plasmas, 2014, 21: 102508.

托卡马克边缘湍流中带状流的负粘滞阻尼

Negative viscosity damping of zonal flows in tokamak edge turbulence

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