日冕物质抛射及其与太阳风相互作用的高性能数值模拟方法研究

为了深入研究日冕物质抛射(CME)过程中大尺度磁结构的演化，本项目以CME事件中的物理过程为模拟对象，开发一套运行在高性能超算平台上、模拟CME在日地空间演化的三维磁流体动力学(MHD)数值模拟程序；与此同时，还将开发数据后处理程序包，从模拟数据中提取大尺度磁结构演化关键信息。相关技术模块和物理过程包括：1、改进已有的追踪三维磁力线演化的程序，完善已有的图像合成技术；利用该两项技术研究CME三分量结构的形成与观测特征。2、完善已有的球坐标系中的拉伸网格技术。3、结合太阳风对CME演化影响的科学问题，研发和调试能够模拟30～50个太阳半径范围内CME与太阳风相互作用的计算程序。

In order to study the evolution of the large-scale magnetic structure of the coronal mass ejection (CME), we will perform a set of 3D magnetohydrodynamics (MHD) numerical experiments to address CME-related physical issues. During the research process, we will gradually develop a 3D MHD numerical simulation program, which can simulate the evolution of the CME in the solar-terrestrial space and can be deployed to the high-performance supercomputer. In the meanwhile, we will also collect a set of data processing programs, so that we can extract critical information about the evolution of large-scale magnetic structure from the raw simulation datum. ..Involved technical details and physical processes are listed here: 1, improving the already-existed program to trace to the evolution of the 3D magnetic field line, extending the functionality of the already-existed forward modeling program to obtain the synthetic image from the simulation datum. Based on these two technologies, studying the formation of the three-component structure of the CME and its observational characteristics. 2, improving the already-existed stretching calculation grid in the spherical coordination system. 3, developing a program to simulate the interaction between CME and solar wind in a region covering 30～50 solar radii and studying the effect of solar wind on the evolution of the CME.