• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nuclear fusion >Self-consistent gyrokinetic modeling of neoclassical and turbulent impurity transport
【24h】

Self-consistent gyrokinetic modeling of neoclassical and turbulent impurity transport

机译：新古典和湍流杂质运移的自洽动力学模型

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

Trace impurity transport is studied with the flux-driven gyrokinetic GYSELA code (Grandgirard et al 2016 Comput. Phys. Commun. 207 35). A reduced and linearized multi-species collision operator has been recently implemented, so that both neoclassical and turbulent transport channels can be treated self-consistently on an equal footing. In the Pfirsch-Schlueter regime that is probably relevant for tungsten, the standard expression for the neoclassical impurity flux is shown to be recovered from gyrokinetics with the employed collision operator. Purely neoclassical simulations of deuterium plasma with trace impurities of helium, carbon and tungsten lead to impurity diffusion coefficients, inward pinch velocities due to density peaking, and thermo-diffusion terms which quantitatively agree with neoclassical predictions and NEO simulations (Belli et al 2012 Plasma Phys. Control. Fusion 54 015015). The thermal screening factor appears to be less than predicted analytically in the Pfirsch-Schlueter regime, which can be detrimental to fusion performance. Finally, self-consistent nonlinear simulations have revealed that the tungsten impurity flux is not the sum of turbulent and neoclassical fluxes computed separately, as is usually assumed. The synergy partly results from the turbulence-driven in-out poloidal asymmetry of tungsten density. This result suggests the need for self-consistent simulations of impurity transport, i.e. including both turbulence and neoclassical physics, in view of quantitative predictions for ITER.
机译：使用通量驱动的陀螺动力学GYSELA代码（Grandgirard等，2016 Comput。Phys。Commun。207 35）研究痕量杂质的迁移。最近已经实现了一种简化的线性多物种碰撞算子，因此新古典和湍流运输通道都可以在平等的基础上自如地对待。在Pfirsch-Schlueter体系中，可能与钨有关，新古典杂质通量的标准表达式已显示出是通过采用碰撞算子从动力学学中获得的。具有微量氦，碳和钨杂质的氘等离子体的纯新古典模拟会导致杂质扩散系数，由于密度峰值而产生的向内收缩速度以及热扩散项，这些数值与新古典预测和NEO模拟在数量上相符（Belli等人，2012年，Plasma Phys （Control.Fusion 54 015015）。热筛选因子似乎小于Pfirsch-Schlueter方案中的分析预测值，这可能对融合性能有害。最后，自洽非线性仿真表明，钨杂质通量不是通常所假设的湍流和新古典通量之和。协同作用部分归因于湍流驱动的钨密度的进出极向不对称性。考虑到对ITER的定量预测，该结果表明需要对杂质迁移进行自洽的模拟，即包括湍流和新古典物理学。

著录项

  • 来源
    《Nuclear fusion》 |2018年第3期|036013.1-036013.14|共14页
  • 作者

    D. Esteve; Y. Sarazin; X. Garbet; V. Grandgirard; S. Breton; P. Donnel; Y. Asahi; C. Bourdelle; G. Dif-Pradalier; C. Ehrlacher; C. Emeriau; Ph. Ghendrih; C. Gillot; G. Latu; C. Passeron;

  • 作者单位

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France,Japan Atomic Energy Agency, Wakashiba 178-4, Kashiwa, Chiba 277-0871, Japan;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France,Laboratoire AIM Paris-Saclay, CEA/Irfu Universite Paris-Diderot CNRS/INSU, F-91191 Gif-sur-Yvette, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance cedex, France;

    CEA, IRFM, F-13108 Saint-Paul-lez-Durance 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

    impurity transport; neoclassical transport; turbulent transport; Pfirsch-Schlueter regime; gyrokinetic simulations; tokamaks;

    机译：杂质传输新古典主义运输湍流运输;普菲施-施吕特政权;陀螺动力学模拟;托卡马克;

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