Two existing particle-in-cell gyrokinetic codes, GEM for the core region and XGC for the edge region, have been successfully coupled with a spatial coupling scheme at the interface in a toroidal geometry. A mapping technique is developed for transferring data between GEM's structured and XGC's unstructured meshes. Two examples of coupled simulations are presented to demonstrate the coupling scheme. The optimization of GEM for graphics processing unit is also presented.

中文翻译：

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单元格陀螺动力学代码GEM和XGC的空间核边缘耦合

两种现有的单元内粒子运动学代码，即用于核心区域的GEM和用于边缘区域的XGC，已经成功地在环形几何体的界面处采用了空间耦合方案。开发了一种映射技术，用于在GEM的结构化网格和XGC的非结构化网格之间传输数据。给出了耦合仿真的两个例子以说明耦合方案。还介绍了用于图形处理单元的GEM的优化。