CAREER: Studies of 3D Dynamics in the Global Magnetosphere Using High-performance Heterogeneous Computing Architectures

这是一个跨学科项目，旨在开发一个新版本的OpenGGCM（开放地球空间环流模型）磁流体动力学（MHD）代码，该代码将在各种计算环境中高效运行。MHD代码将包括一个广义的欧姆定律和霍尔项，使其能够准确地模拟磁重联以及薄电流片中的等离子体不稳定性。该代码将用于研究霍尔物理和二次不稳定性对白天侧3D重连和通量传输事件（fte）产生的影响，以及对夜晚侧亚暴的发生的影响。该项目还将研究地球附近的气球不稳定性与中尾磁重联之间的相互作用。该项目将开发和利用一个自动计算机代码生成工具，允许用户创建适合特定计算机体系结构的源代码。除了使用此代码检查磁层的物理性质外，该项目还将使代码生成工具成为一个开源工具包，该工具包将广泛适用于基于模板计算的科学应用程序。薄电流片的磁重联和二次不稳定性对理解地球全球磁层和空间天气的动力学具有至关重要的意义。将现实物理纳入和理解全球磁层代码是模拟和预报空间天气的重要步骤。将开发的计算方法适用于科学和工程中涉及求解偏微分方程的广泛应用。该提案还包含广泛的教育内容。它包括课程改进和创建夏季系列研讨会，以在UNH形成一个计算社区，目标是研究生，博士后和教师。此外，还将开发一个基于PlayStation-3的空间天气演示装置，用于向学生推广。这个拓展项目将开发不同版本的示范，适用于广泛的学生，从高中一直到研究生院。

This is a cross-disciplinary project to develop a new version of the OpenGGCM (Open geospace general circulation model) magnetohydrodynamic (MHD) code that will run efficiently on a variety of computing environments. The MHD code will include a generalized Ohm's law and the Hall term to enable it to accurately model magnetic reconnection as well as plasma instabilities in thin current sheets. The code will be used to investigate the impact of Hall physics and secondary instabilities on 3D reconnection and generation of Flux Transfer Events (FTEs) at the dayside, as well as on substorm onset at the night side. The project will also investigate the interplay between the ballooning instability near Earth and magnetic reconnection in the mid-tail. The project will develop and utilize an automatic computer code generation tool that allows the user to create source code appropriate to a specific computer architecture. In addition to examining the physics of the magnetosphere using this code, the project will also make the code generating tool into an open source toolkit that will have broad applicability to science applications that are based on what are known as stencil computations.Magnetic reconnection and secondary instabilities of thin current sheets are of crucial importance to understanding the dynamics of Earth's global magnetosphere and space weather. Incorporating and understanding realistic physics into global magnetospheric codes is an important step in modeling and forecasting space weather. The computational methods that will be developed are applicable to a large range of applications in science and engineering that involve solving partial differential equations. The proposal also has an extensive educational component. It includes curriculum enhancement and creation of a summer seminar series to form a computational community at UNH, targeting graduate students, postdocs and faculty. A space weather demonstration device based on the PlayStation-3 with also be developed and used for outreach to students. This outreach program will develop different versions of the demonstration applicable to a wide range of students, from high school all the way through to graduate school.