Modeling Physical Processes in the Solar Wind and Local Interstellar Medium with Multi-Scale Fluid-Kinetic Simulation Suite

使用多尺度流体动力学仿真套件对太阳风和当地星际介质中的物理过程进行建模

• 批准号: 1811176
• 负责人: Nikolai Pogorelov
• 金额: $ 1.05万
• 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: 2018
• 资助国家: 美国
• 起止时间: 2018-04-01 至 2020-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1811176&HistoricalAwards=false
• 关键词: Modeling; Physical; Processes; Solar; Wind

The objective of this proposal is to use the possibilities provided by the Blue Waters supercomputer to model fundamental and challenging space physics problems. The heliosphere is the sphere like region of space dominated by the Sun, which extends far beyond the orbit of Pluto. The Solar Wind (SW) consists of ionized atoms from the Sun. The project will model the SW flows in the inner and outer heliosphere, and compare the results with observational data. It is anticipated that the project will provide a leap forward in the simulation of complex charged and neutral gas systems. Furthermore, the proposed approach to computational resource management for complex codes utilizing multiple algorithm technologies is expected to be a major advance to current approaches. The development of resource management technologies will be essential for all future modeling efforts that incorporate a wide diversity of scales and physical processes.The analysis of flows of partially ionized plasma that are characterized by multiple or highly localized scales and multiple processes, will have a transformative impact for heliophysics. The project will address a variety of physical phenomena occurring throughout the solar system, such as the charge exchange processes between neutral and charged particles, the birth of pick-up ions (PUIs), the origin of energetic neutral atoms (ENAs), turbulence, the interplay of the heliopause instability and magnetic reconnection at the SW and local interstellar medium (LISM) interface, plasma wave generation in the LISM, the effect of the heliosphere on the TeV cosmic ray anisotropy, and more. The project will also fit simulation results with observational data to constrain the properties of the LISM and refine time-dependent SW models. The project will incorporate the direct measurements from the New Parker Solar Probe and Solar Orbiter missions, as well as the in situ measurements of the SW from the Sun to Earth and further to the heliospheric boundary, from the New Horizons, Voyager, IBEX, and air shower observations. This project will extract the fundamental physics of plasma-neutral flows accompanied by the interaction with energetic particles. The goal of the modeling activities is to understand and interpret observations in a way previously unthinkable because of the limitations in both physical models and computing power. Components of the physical model and corresponding code routines will be made available in a publicly accessible simulation suite.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项建议的目的是利用Blue沃茨超级计算机提供的可能性，模拟基本的和具有挑战性的空间物理问题。 日光层是由太阳主导的球形空间区域，它远远超出冥王星的轨道。 太阳风（SW）由来自太阳的电离原子组成。 该项目将模拟日光层内外的西南气流，并将结果与观测数据进行比较。 预计该项目将在复杂的带电和中性气体系统的模拟方面实现飞跃。此外，所提出的方法，利用多种算法技术的复杂代码的计算资源管理，预计将是一个重大的进步，目前的方法。资源管理技术的发展将是必不可少的所有未来的建模工作，包括广泛多样的规模和物理processing.The部分电离等离子体的流动，其特点是多个或高度本地化的规模和多个过程的分析，将有一个变革性的影响，太阳物理学。该项目将研究整个太阳系发生的各种物理现象，如中性粒子和带电粒子之间的电荷交换过程、拾取离子的诞生、高能中性原子的起源、湍流、太阳层顶不稳定性和SW与局部星际介质界面处的磁重联的相互作用、LISM中的等离子体波产生、日球层对TeV宇宙射线各向异性的影响等等。 该项目还将模拟结果与观测数据相匹配，以约束LISM的属性并改进随时间变化的SW模型。该项目将包括新帕克太阳探测器和太阳轨道器任务的直接测量，以及新视野号、旅行者号、IBEX和空气簇射观测对从太阳到地球以及进一步到日光层边界的SW的现场测量。该项目将提取等离子体中性流伴随着与高能粒子的相互作用的基本物理。建模活动的目标是以一种由于物理模型和计算能力的限制而以前无法想象的方式理解和解释观测结果。物理模型的组成部分和相应的代码例程将在一个公开访问的模拟套件中提供。该奖项反映了NSF的法定使命，并被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

On the Anisotropy of Galactic Cosmic Rays

论银河宇宙线的各向异性

• DOI: 10.3847/1538-4357/ab24c1
• 发表时间: 2019
• 期刊: The Astrophysical Journal
• 作者: Schlickeiser;R. Oppotsch;Pogorelov
• 通讯作者: Pogorelov

Predicting the Solar Wind at the Parker Solar Probe Using an Empirically Driven MHD Model

• DOI: 10.3847/1538-4365/ab58c9
• 发表时间: 2019-12
• 期刊: The Astrophysical Journal Supplement Series
• 作者: Tae K. Kim;N. Pogorelov;C. Arge;C. Henney;S. I. Jones-Mecholsky;S. I. Jones-Mecholsky;W. P. Smith

Rankine–Hugoniot Relations Including Pickup Ions

包含拾取离子的朗肯-雨戈尼奥关系

• DOI: 10.3847/1538-4357/ab6660
• 发表时间: 2020
• 期刊: The Astrophysical Journal
• 作者: Gedalin, Michael;Pogorelov, Nikolai V.;Roytershteyn, Vadim
• 通讯作者: Roytershteyn, Vadim

The Original Anisotropy of TeV Cosmic Rays in the Local Interstellar Medium

局域星际介质中 TeV 宇宙线的原始各向异性

• DOI: 10.3847/1538-4357/ab643c
• 发表时间: 2020
• 期刊: The Astrophysical Journal
• 作者: Pogorelov;Schlickeiser
• 通讯作者: Schlickeiser

Magnetic Turbulence Spectra and Intermittency in the Heliosheath and in the Local Interstellar Medium

• DOI: 10.3847/1538-4357/aafd30
• 发表时间: 2019-02-10
• 期刊: ASTROPHYSICAL JOURNAL
• 影响因子: 4.9
• 作者: Fraternale, Federico;Pogorelov, Nikolai, V;Tordella, Daniela
• 通讯作者: Tordella, Daniela