dHybrid：一个用于空间等离子体混合模拟的大规模并行程序
dHybrid: a massively parallel code for hybrid simulations of space plasmas
摘要：
为了对空间等离子体相互作用进行全球范围的研究，开发了一个大规模并行模拟程序\textit{dHybrid}。该代码是基于一个显式的混合模型，数值稳定性和并行可扩展性的代码进行了研究。一个稳定化方法的显式算法，近零密度的区域，提出。对太阳风与未磁化人造物体相互作用进行了三维混合模拟，重点研究了等离子体云膨胀到太阳风中，产生反磁空腔并将行星际磁场驱离膨胀区的过程。这个系统的动力学可以为其他类似的场景提供见解，例如太阳风与非磁化行星的相互作用。
英文摘要：
A massively parallel simulation code, called \textit{dHybrid}, has been developed to perform global scale studies of space plasma interactions. This code is based on an explicit hybrid model; the numerical stability and parallel scalability of the code are studied. A stabilization method for the explicit algorithm, for regions of near zero density, is proposed. Three-dimensional hybrid simulations of the interaction of the solar wind with unmagnetized artificial objects are presented, with a focus on the expansion of a plasma cloud into the solar wind, which creates a diamagnetic cavity and drives the Interplanetary Magnetic Field out of the expansion region. The dynamics of this system can provide insights into other similar scenarios, such as the interaction of the solar wind with unmagnetized planets.
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