Modeling Heliophysics and Astrophysics Phenomena with a Multi-Scale Fluid-Kinetic Simulation Suite

使用多尺度流体动力学模拟套件对太阳物理学和天体物理学现象进行建模

• 批准号: 1144120
• 负责人: Nikolai Pogorelov
• 金额: $ 3.19万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1144120&HistoricalAwards=false
• 关键词: Modeling; Heliophysics; Astrophysics; Phenomena; Multi

Flows of partially ionized plasma are frequently characterized by the presence of both thermal and nonthermal populations of ions. This occurs, e. g., in the outer heliosphere, the part of interstellar space beyond the solar system whose properties are determined by the solar wind (SW) interaction with the local interstellar medium (LISM). Understanding the behavior of such flows requires us toinvestigate a variety of physical phenomena occurring throughout the solar system. The current proposal addresses the question the sky-spanning "ribbon" of unexpectedly intense emissions of ENAs detected by the Interstellar Boundary Explorer (IBEX) mission. By modeling the heliosphere using the resources of the Blue Waters facility at NCSA its becomes possible to analyze such puzzling astrophysical flows as those in the Guitar nebula, and compare modeling with remote observations. Numerical solution of these problems with the realistic boundary conditions provided by remote and in situ observations of the SW properties, requires the application of adaptive mesh refinement (AMR) technologies and petascale supercomputers. Codes developed during the NSF ITR program and various NASA projects will be used for the modeling and compared with observations by IBEX.

部分电离等离子体流的特征通常是热离子和非热离子的存在。这是，E。例如，在一个实施例中，太阳系以外的星际空间的一部分，其性质由太阳风（SW）与本地星际介质（LISM）的相互作用决定。要了解这种流动的行为，我们需要调查整个太阳系中发生的各种物理现象。 目前的提议解决了星际边界探测器（IBEX）使命探测到的ENA意外强烈发射的横跨天空的“丝带”问题。通过利用NCSA的Blue沃茨设施的资源对日光层进行建模，可以分析吉他星云中令人困惑的天体物理流动，并将建模与远程观测进行比较。这些问题的数值解与现实的边界条件所提供的远程和现场观测的SW属性，需要应用自适应网格细化（AMR）技术和千万亿次超级计算机。在NSF ITR计划和各种NASA项目期间开发的代码将用于建模，并与IBEX的观测结果进行比较。