...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nuclear fusion >Analysis of symmetry breaking mechanisms and the role of turbulence self-regulation in intrinsic rotation
【24h】

Analysis of symmetry breaking mechanisms and the role of turbulence self-regulation in intrinsic rotation

机译：对称破坏机理及湍流自律在固有旋转中的作用分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present analyses of mechanisms which convert radial inhomogeneity to broken k_‖-symmetry and thus produce turbulence driven intrinsic rotation in tokamak plasmas. By performing gyrokinetic simulations of ITG turbulence, we explore the many origins of broken k_‖-symmetry in the fluctuation spectrum and identify both E x B shear and the radial gradient of turbulence intensity-a ubiquitous radial inhomogeneity in tokamak plasmas-as important k_‖-symmetry breaking mechanisms. By studying and comparing the correlations between residual stress, E x B shearing, fluctuation intensity and its radial gradient, we investigate the dynamics of residual stress generation by various symmetry breaking mechanisms and explore the implication of the self-regulating dynamics of fluctuation intensity and E x B shearing for intrinsic rotation generation. Several scalings for intrinsic rotation are reported and are linked to investigations of underlying local dynamics. It is found that stronger intrinsic rotation is generated for higher values of ion temperature gradient, safety factor and weaker magnetic shear. These trends are broadly consistent with the intrinsic rotation scaling found from experiment-the so-called Rice scaling.
机译：我们介绍了将径向不均匀性转换为破碎的k _′-对称性，从而在托卡马克等离子体中产生湍流驱动的固有旋转的机理的分析。通过对ITG湍流进行陀螺动力学模拟，我们发现了波动谱中破碎的k _′-对称性的许多起源，并确定了E x B剪切力和湍流强度的径向梯度（在托卡马克等离子体中普遍存在的径向不均匀性）作为重要的k_”。对称破坏机制。通过研究和比较残余应力，E x B剪切，涨落强度及其径向梯度之间的相关性，我们研究了各种对称破坏机制产生的残余应力的动力学，并探讨了涨落强度和E的自调节动力学的含义。 x B剪切用于固有旋转生成。报告了固有旋转的几种缩放比例，这些缩放比例与对基础局部动力学的研究相关。已发现，对于更高的离子温度梯度，安全系数和更弱的磁剪切，会产生更强的固有旋转。这些趋势与从实验中发现的内在旋转尺度（所谓的莱斯尺度）基本一致。

著录项

  • 来源
    《Nuclear fusion》 |2012年第1期|p.013004.1-013004.15|共15页
  • 作者

    J.M. Kwon; S. Yi; T. Rhee; R.H. Diamond; K. Miki; T.S. Hahm; J.Y. Kim; OE.D. Guercan; C. McDevitt;

  • 作者单位

    National Fusion Research Institute, 52, Yeoeun-dong, Yusung-Gu, Daejeon,Republic of Korea;

    National Fusion Research Institute, 52, Yeoeun-dong, Yusung-Gu, Daejeon,Republic of Korea;

    National Fusion Research Institute, 52, Yeoeun-dong, Yusung-Gu, Daejeon,Republic of Korea;

    National Fusion Research Institute, 52, Yeoeun-dong, Yusung-Gu, Daejeon,Republic of Korea,CMTFO and CASS, University of California San Diego, La Jolla, CA 92093-0429, USA;

    National Fusion Research Institute, 52, Yeoeun-dong, Yusung-Gu, Daejeon,Republic of Korea;

    Department of Nulcear Engineering, Seoul National University, Seoul, Korea;

    National Fusion Research Institute, 52, Yeoeun-dong, Yusung-Gu, Daejeon,Republic of Korea;

    Laboratorie de Physique des Plasmas, Ecole Polytechnique, CNRS, 91 128 Palaiseau Cedex,France;

    CMTFO and CASS, University of California San Diego, La Jolla, CA 92093-0429, USA,Laboratorie de Physique des Plasmas, Ecole Polytechnique, CNRS, 91 128 Palaiseau Cedex,France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号