论文标题
在Tokamak极限
Testing of the new JOREK stellarator-capable model in the tokamak limit
论文作者
论文摘要
为了准备将Jorek非线性MHD代码扩展到恒星剂，已得出和测试了具有恒星功能的降低和完整MHD模型的层次结构。该派生是在EFTC 2019会议上提出的。继续进行这项工作，我们已经实施了减少的MHD模型（ARXIV：1907.12486），以及一个替代模型，该模型是使用不同集合的投影操作员新得出的，用于从完整的MHD矢量动量方程中获取标量动量方程。借助新的运算符，还原模型与标准的Jorek匹配Tokamak限制中的Tokamaks的模型，并准确地保存了能量，而在存在现场对齐的流量时，动量保护的准确性不如原始模型。
In preparation for extending the JOREK nonlinear MHD code to stellarators, a hierarchy of stellarator-capable reduced and full MHD models has been derived and tested. The derivation was presented at the EFTC 2019 conference. Continuing this line of work, we have implemented the reduced MHD model (arXiv:1907.12486) as well as an alternative model which was newly derived using a different set of projection operators for obtaining the scalar momentum equations from the full MHD vector momentum equation. With the new operators, the reduced model matches the standard JOREK reduced models for tokamaks in the tokamak limit and conserves energy exactly, while momentum conservation is less accurate than in the original model whenever field-aligned flow is present.
