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arXiv 2201.12033physics.plasm-phphysics.comp-ph
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JOREK3D:JOREK非线性MHD程序向仿星器的扩展

JOREK3D: An extension of the JOREK nonlinear MHD code to stellarators

Nikita Nikulsin, Rohan Ramasamy, Matthias Hoelzl, Florian Hindenlang, Erika Strumberger, Karl Lackner, Sibylle Günter

AI总结:

本研究将JOREK非线性MHD程序扩展至三维几何结构得到JOREK3D,针对Wendelstein 7-A仿星器的模拟验证了约化模型的平衡保持能力,且撕裂模、气球模的线性增长率与CASTOR3D结果吻合,为仿星器非线性3D MHD研究提供了新工具。

摘要:

尽管仿星器的基本概念在聚变研究早期就已为人所知,但计算技术的进步使得对日益复杂的装置进行建模成为可能,最终促成了Wendelstein 7-X的建造,该装置近期取得了颇具前景的结果。这一近期成果重新激发了人们对仿星器非线性三维MHD建模的兴趣,以便更好地理解其性能和运行极限。本文报道了JOREK程序向三维几何结构的扩展,以及利用该程序开展的首次仿星器模拟工作。此处展示的首批简单模拟采用我们此前推导的约化MHD模型,针对经典的Wendelstein 7-A仿星器展开。结果表明,稳定的全MHD平衡态在约化模型中得以保持:模拟过程中通量面不发生移动,且与全MHD平衡态的通量面高度吻合。此外,研究还模拟了撕裂模和气球模,在JOREK中测得的线性增长率与CASTOR3D线性MHD程序给出的增长率合理一致。

英文摘要:

Although the basic concept of a stellarator was known since the early days of fusion research, advances in computational technology have enabled the modelling of increasingly complicated devices, leading up to the construction of Wendelstein 7-X, which has recently shown promising results. This recent success has revived interest in the nonlinear 3D MHD modelling of stellarators in order to better understand their performance and operational limits. This paper reports on the extension of the JOREK code to 3D geometries and on the first stellarator simulations carried out with it. The first simple simulations shown here address the classic Wendelstein 7-A stellarator using a reduced MHD model previously derived by us. The results demonstrate that stable full MHD equilibria are preserved in the reduced model: the flux surfaces do not move throughout the simulation, and closely match the flux surfaces of the full MHD equilibrium. Further, both tearing and ballooning modes were simulated, and the linear growth rates measured in JOREK are in reasonable agreement with the growth rates from the CASTOR3D linear MHD code.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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