论文标题
Phare：与基于贴片的自适应网状细节完善的平行混合粒子代码
PHARE : Parallel hybrid particle-in-cell code with patch-based adaptive mesh refinement
论文作者
论文摘要
建模多尺度无碰撞磁化过程构成了重要的数值挑战。通过将电子视为流体和离子，所谓的杂交粒子中粒子（PIC）代码代表了完全动力学代码之间的有前途的中介，仅限于模型的小尺度和短时间，以及使用大尺度的磁性水力动力学代码。但是，在解决亚离子耗散电流板的同时，在尺度上模拟过程明显大于典型的离子颗粒动力学。本文提出了一种新的混合图片代码，并具有基于补丁的自适应网格精炼。在这里，混合图片方程在任意数量的增量分辨率的笛卡尔网格的层次结构上求解，动态映射了感兴趣的区域，并以精致的时间步进。本文介绍了如何适应混合图片算法以在均匀网格，固定精制的网格和动态精制的网格上演变为网格层次结构以及代码的验证。
Modeling multi-scale collisionless magnetized processes constitutes an important numerical challenge. By treating electrons as a fluid and ions kinetically, the so-called hybrid Particle-In-Cell (PIC) codes represent a promising intermediary between fully kinetic codes, limited to model small scales and short durations, and magnetohydrodynamic codes used large scale. However, simulating processes at scales significantly larger than typical ion particle dynamics while resolving sub-ion dissipative current sheets remain extremely difficult. This paper presents a new hybrid PIC code with patch-based adaptive mesh refinement. Here, hybrid PIC equations are solved on a hierarchy of an arbitrary number of Cartesian meshes of incrementally finer resolution dynamically mapping regions of interest, and with a refined time stepping. This paper presents how the hybrid PIC algorithm is adapted to evolve such mesh hierarchy and the validation of the code on a uniform mesh, fixed refined mesh and dynamically refined mesh.
