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Multi-scale transport simulation of toroidal momentum source profile effect on internal transport barrier collapse

机译:环形动量源剖面对内部输运屏障塌陷的多尺度输运模拟

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摘要

The mechanism of internal transport barrier (ITB) collapse in the reversed magnetic shear configuration is investigated using a global ion temperature gradient (ITG) driven drift wave turbulence code. A heating source and a toroidal momentum source are introduced to follow the self-consistent evolution of the ion temperature and flow profiles. A scenario of transport barrier collapse driven by a meso-scale mode excited in the barrier region is suggested. The importance of the quasi-linear effect due to profile modification as well as three-wave coupling is clearly shown by means of energy transfer analysis. The effect of the toroidal flow shear (TFS) profile on the dynamics of ITB evolution is investigated. It is found that the decorrelation between meso-scale modes and ITG driven modes due to the TFS can prevent global relaxation.
机译:使用全局离子温度梯度(ITG)驱动的漂移波湍流代码研究了反向磁剪切配置中内部传输势垒(ITB)崩溃的机理。引入加热源和环形动量源来跟踪离子温度和流量分布的自洽演变。提出了由在障碍区域中激发的中尺度模式驱动的运输障碍崩溃的情况。通过轮廓转移以及三波耦合,准线性效应的重要性已通过能量转移分析清楚地显示出来。研究了环形流动剪切(TFS)轮廓对ITB演化动力学的影响。发现由于TFS,中尺度模式和ITG驱动模式之间的去相关可以防止全局松弛。

著录项

  • 来源
    《Nuclear fusion》 |2009年第7期|75023.1-75023.9|共9页
  • 作者单位

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga, Fukuoka, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, Japan;

    Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, Japan;

    National Institute for Fusion Science, Toki, Gifu, Japan;

  • 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

    plasma turbulence; transport properties; gyrofluid and gyrokinetic simulations;

    机译:等离子体湍流运输特性;旋流和动力学模拟;

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