欢迎访问《核聚变与等离子体物理》官方网站,今天是 分享到:

核工业西南物理研究院 ›› 2025, Vol. 45 ›› Issue (2): 235-241.DOI: 10.16568/j.0254-6086.202502016

• 等离子体物理 • 上一篇    下一篇

全域多离子成分回旋朗道流体模型及湍流输运模拟

刘逸飞,李继全*   

  1. (核工业西南物理研究院,成都 610041)
  • 收稿日期:2023-04-17 修回日期:2023-12-28 出版日期:2025-06-15 发布日期:2025-06-13
  • 通讯作者: 李继全(1966-),男,湖北麻城人,研究员,博士研究生导师,从事聚变等离子体物理理论与模拟研究。
  • 作者简介:刘逸飞(1998-),男,河北邯郸人,硕士研究生,从事聚变等离子体物理理论与模拟研究。
  • 基金资助:
    国家自然科学基金(U1967206);国家自然科学基金(12275071);国家重点研发项目(2017YFE0301201)

Global multispecies gyro-Landau-fluid model and simulation of turbulence transport

LIU Yi-fei, LI Ji-quan   

  1. (Southwestern Institute of Physics, Chengdu 610041)
  • Received:2023-04-17 Revised:2023-12-28 Online:2025-06-15 Published:2025-06-13

摘要:

提出了一套模拟托卡马克等离子体中离子温度梯度(ITG)模的全域多离子成分回旋朗道流体模型,并发展了适用于在全域ITG湍流模拟中准确计算有限拉莫尔半径效应和带状流水平的方法。扩展流体程序(ExFC)的模拟结果表明,回旋流体模型不仅能够自洽地模拟氢同位素ITG不稳定性,而且能够准确地模拟长波长区域的带状流残余流水平,ITG湍流的临界温度梯度和输运水平更接近回旋动理学模拟的结果。此外,在非线性模拟中还观测到了一种典型的具有非扩散输运特征的全域ITG湍流现象,即雪崩输运。

关键词: 回旋朗道流体模型, 有限拉莫尔半径效应, 带状流, 湍流输运

Abstract:

In this work, a global multispecies gyro-Landau-fluid model to simulate the ion temperature gradient (ITG) mode in tokamak plasma is proposed. The methods applicable to the accurate calculation of finite Larmor radius (FLR) effects and zonal flow residual levels in global ITG turbulence simulation are developed based on the extended fluid code (ExFC). The simulation results show that the model is not only able to self-consistently simulate the hydrogen isotope ITG instability, but also simulates residual levels of zonal flows in the long wavelength region accurately, and the critical temperature gradient and transport level of the ITG turbulence simulations are closer to those of gyrokinetic model. In addition, the nonlinear simulations demonstrate an avalanche transport phenomenon, which is a typical nondiffusive transport feature of the global ITG turbulence.

Key words: Gyro Landau fluid model, FLR effect, Zonal flow, Turbulence transport

中图分类号: