Validation of the 3D AMR SIP-CESE Solar Wind Model for Four Carrington Rotations
Validation of the 3D AMR SIP-CESE Solar Wind Model for Four Carrington Rotations
复制标题
验证卡林顿四圈的 3D AMR SIP-CESE 太阳风模型
DOI：
10.1007/s11207-012-9969-9
复制
发表时间：
2012-07-01
期刊：
影响因子：
2.8
通讯作者：
Zhou, Yufen
中科院分区：
文献类型：
--
作者：
Feng, Xueshang;Yang, Liping;Zhou, Yufen
我们使用六分量网格系统对我们的日球 - 行星际时空守恒元和解元（CESE）磁流体动力学模型（SIP - CESE MHD模型）进行自适应网格细化（AMR）实现（冯、周和吴，《天体物理学杂志》655卷，1110页，2007年；冯等人，《天体物理学杂志》723卷，300页，2010年）。通过将控制磁流体动力学方程从物理空间（x，y，z）转换到计算空间（ξ，η，ζ），同时保持守恒形式（江等人，《太阳物理学》267卷，463页，2010年），SIP - AMR - CESE MHD模型借助可在http://sourceforge.net/projects/paramesh/获取的并行AMR软件包PARAMESH在参考坐标系中得以实现。同时，还包括由磁场膨胀因子的拓扑结构以及开放场足点与其最近的冕洞边界之间（在光球层）的最小角间距导出的体积加热源项。通过与太阳和太阳风层探测器（SOHO）的观测以及来自OMNI的其他航天器数据进行比较，我们展示了应用SIP - AMR - CESE MHD模型模拟不同太阳活动阶段的太阳风背景的初步结果。我们的数值结果表明，在日冕和行星际空间中与这些多航天器观测结果总体上吻合良好。
We carry out the adaptive mesh refinement (AMR) implementation of our solar-interplanetary space-time conservation element and solution element (CESE) magnetohydrodynamic model (SIP-CESE MHD model) using a six-component grid system (Feng, Zhou, and Wu, Astrophys. J. 655, 1110, 2007; Feng et al., Astrophys. J. 723, 300, 2010). By transforming the governing MHD equations from the physical space (x,y,z) to the computational space (xi,eta,zeta) while retaining the form of conservation (Jiang et al., Solar Phys. 267, 463, 2010), the SIP-AMR-CESE MHD model is implemented in the reference coordinates with the aid of the parallel AMR package PARAMESH available at http://sourceforge.net/projects/paramesh/. Meanwhile, the volumetric heating source terms derived from the topology of the magnetic-field expansion factor and the minimum angular separation (at the photosphere) between an open-field foot point and its nearest coronal-hole boundary are also included. We show the preliminary results of applying the SIP-AMR-CESE MHD model for simulating the solar-wind background of different solar-activity phases by comparison with SOHO observations and other spacecraft data from OMNI. Our numerical results show overall good agreements in the solar corona and in interplanetary space with these multiple-spacecraft observations.