Hermes: global plasma edge fluid turbulence simulations
Hermes: global plasma edge fluid turbulence simulations
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DOI：
10.1088/1361-6587/aa63d2
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发表时间：
2016-09
影响因子：
2.2
通讯作者：
B. Dudson;J. Leddy
中科院分区：
文献类型：
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作者：
B. Dudson;J. Leddy
磁约束等离子体相对碰撞边缘区域的热和粒子输运是一个具有科学挑战性和技术重要性的问题。理解和预测这种输运需要等离子体波动、全球剖面和流动的自一致演变，但能够在现实（转向）几何中做到这一点的数值工具现在才开发出来。本文提出了一个5场简化的2流体等离子体模型，用于研究磁化等离子体中的不稳定性和湍流。这种冷离子模型允许在输运时间尺度上全球剖面、电场和流动的演变，通过等离子体湍流自一致地确定通量驱动的跨场输运。描述了模型公式和数值实现的发展，并在多极受限和偏转的托卡马克配置中进行了模拟。
The transport of heat and particles in the relatively collisional edge regions of magnetically confined plasmas is a scientifically challenging and technologically important problem. Understanding and predicting this transport requires the self-consistent evolution of plasma fluctuations, global profiles and flows, but the numerical tools capable of doing this in realistic (diverted) geometry are only now being developed. Here a 5-field reduced 2-fluid plasma model for the study of instabilities and turbulence in magnetised plasmas is presented, built on the BOUT++ framework. This cold ion model allows the evolution of global profiles, electric fields and flows on transport timescales, with flux-driven cross-field transport determined self-consistently through plasma turbulence. Developments in the model formulation and numerical implementation are described, and simulations are performed in poloidally limited and diverted tokamak configurations.