恩佐的宇宙学AMR MHD模
A cosmological AMR MHD module for Enzo
摘要：
磁场在包括恒星形成在内的几乎所有天体物理现象中起着重要的作用。但由于解析建模和观测的困难，对磁场的研究还很薄弱，数值模拟已成为主要的工具。我们已经实现了一个宇宙学磁流体力学包恩佐这是一个AMR流体动力学代码，旨在模拟结构的形成。我们使用S. Li作为基础求解器。此外，我们采用D.巴尔萨拉为了将磁场插值到精细网格，我们使用了Balsara也描述的无发散二次重建。我们给出了几个实验问题的结果，包括磁流体焦散、磁流体饼和有磁场的星系团形成。我们还讨论了我们的AMR MHD代码的第一颗星的研究可能的应用。
英文摘要：
Magnetic fields play an important role in almost all astrophysical phenomena including star formation. But due to the difficulty in analytic modeling and observation, magnetic fields are still poorly studied and numerical simulation has become a major tool. We have implemented a cosmological magnetohydrodynamics package for Enzo which is an AMR hydrodynamics code designed to simulate structure formation. We use the TVD solver developed by S. Li as the base solver. In addition, we employ the constrained transport(CT) algorithm as described by D. Balsara. For interpolation magnetic fields to fine grids we used a divergence free quadratic reconstruction, also described by Balsara. We present results from several test problems including MHD caustics, MHD pancake and galaxy cluster formation with magnetic fields. We also discuss possible applications of our AMR MHD code to first star research.
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