论文标题
磁性水力动力学，带有嵌入式粒子中的粒子模拟，对地理环境建模时代动力学过程挑战事件
Magnetohydrodynamic with embedded particle-in-cell simulation of the Geospace Environment Modeling dayside kinetic processes challenge event
论文作者
论文摘要
我们将MHD与嵌入式粒子中的模型（MHD-EPIC）一起研究，以研究2015-11-18的01：50-0-0-03：00 UT的时期动力学过程挑战事件，当时磁层是由稳定的南部IMF驱动的。在MHD-EPIC模拟中，日期的磁磁带被PIC代码覆盖，以便适当地处理时代的重新连接。我们比较磁场和MMS3航天器观测值的磁场和血浆曲线。大多数变量在磁层，磁石和当前纸交叉期间都很好地匹配了观测值。 MHD-EPIC模拟会产生通量绳，我们证明了MMS3航天器观察到的某些磁场和等离子体特征可以通过通量绳索交叉事件复制。我们使用算法从模拟结果自动识别重新连接位点。事实证明，磁磁带通常有多个X线。通过追踪X线的位置，我们发现X线端点的典型移动速度约为70〜km/s，它高于但仍然与地面观测值相当。
We use the MHD with embedded particle-in-cell model (MHD-EPIC) to study the Geospace Environment Modeling (GEM) dayside kinetic processes challenge event at 01:50-03:00 UT on 2015-11-18, when the magnetosphere was driven by a steady southward IMF. In the MHD-EPIC simulation, the dayside magnetopause is covered by a PIC code so that the dayside reconnection is properly handled. We compare the magnetic fields and the plasma profiles of the magnetopause crossing with the MMS3 spacecraft observations. Most variables match the observations well in the magnetosphere, in the magnetosheath, and also during the current sheet crossing. The MHD-EPIC simulation produces flux ropes, and we demonstrate that some magnetic field and plasma features observed by the MMS3 spacecraft can be reproduced by a flux rope crossing event. We use an algorithm to automatically identify the reconnection sites from the simulation results. It turns out that there are usually multiple X-lines at the magnetopause. By tracing the locations of the X-lines, we find the typical moving speed of the X-line endpoints is about 70~km/s, which is higher than but still comparable with the ground-based observations.
