Collaborative Research: Frameworks: A Software Ecosystem for Plasma Science and Space Weather Applications

该项目推进了空间和实验室等离子体系统全球模拟的前沿，并使这些进展为广泛的用户社区所利用。这种系统中的等离子体状态通常处于弱碰撞状态，传统的流体模型在此失效。为了描述这样的系统，项目团队正在开发Gkeyll，这是一种包含重要动力学效应的多流体、多力矩模型。该模型可用于对空间天气事件进行高保真和准确的预测，并用于设计和研究从事发现等离子体科学的实验室实验。该项目将开发全面的网络基础设施（CI），以支持专业科学家在从本地集群到高性能计算设施的各种计算平台上执行空间天气和基本等离子体物理模拟。要开发的Gkeyll CI包括(1)提供用于定义、执行和管理模拟的基于web的用户界面，(2)由预定义的任务序列组成的工作流，以及(3)实现工作流任务的用户友好工具。算法的进步将促进Gkeyll科学的发展。Gkeyll是开源的，为空间和实验室等离子体科学社区提供了一个现代和通用的软件生态系统。项目团队具有很强的跨学科性质，包括空间和实验室等离子体科学家、应用数学家、计算机科学家和软件工程师，该项目将促进专业培训和教育的多样性。项目中构建的CI以Gkeyll框架为中心，该框架由先进的等离子体模拟模型、工具和新软件的自动持续集成组成。该项目将提供一个统一和完整的开源解决方案，通过工作流控制来模拟从地球磁层到无碰撞或弱碰撞等离子体状态下的实验室实验的等离子体系统，这对空间天气和实验室等离子体实验至关重要。该项目将扩展和增强Gkeyll的核心算法，并将该软件与NSF科学网关平台即服务（SciGaP）集成。Gkeyll科学得益于核心建模和PDE离散化的进步，包括与方程离散化方法适当匹配的相关参数化几何集的自动化和自适应网格化。该项目将采用现代软件工程实践来生产可伸缩的、安全的、高保真的基于物理的软件。该奖项由先进网络基础设施办公室颁发，由美国国家科学基金会数学和物理科学理事会物理部、大气和地球空间科学部以及美国国家科学基金会地球科学理事会研究、创新、协同和教育部门共同支持。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project advances the frontiers of global simulations of space and laboratory plasma systems, and makes these advances accessible to a broad community of users. The plasma states in such systems are often in weakly collisional regimes where traditional fluid models break down. To describe such systems, the project team is developing Gkeyll, a multi-fluid, multi-moment model that incorporates important kinetic effects. The model can be used for high-fidelity and accurate predictions for space weather events, and for the design and study of laboratory experiments engaged in discovery plasma science. The project will develop comprehensive cyberinfrastructure (CI) to support professional scientists in the execution of space weather and basic plasma physics simulations over a wide variety of computing platforms from local clusters to high-performance computing facilities. Gkeyll CI to be developed includes (1) providing web-based user interfaces for defining, executing, and managing simulations, (2) workflows consisting of of pre-defined sequences of tasks, and (3) user-friendly tools that implement the workflow tasks. Gkeyll science will be facilitated by algorithmic advances. Gkeyll is open-source and provides the space and laboratory plasma science communities with a modern and versatile software ecosystem. The project team is strongly interdisciplinary, including space and laboratory plasma scientists, applied mathematicians, computer scientists and software engineers, and the project will promote diversity in professional training and education.The CI to be built in the project is centered on the Gkeyll framework that consists of advanced plasma simulation models, tools, and automated continuous integration of new software. The project will provide a uniform and complete open-source solution with workflow control to model plasma systems from terrestrial magnetospheres to laboratory experiments in collisionless or weakly collisional plasma regimes, which are essential for space weather and laboratory plasma experiments. The project will extend and enhance the core algorithms in Gkeyll and integrate the software with the NSF Science Gateway Platform as a Service (SciGaP). Gkeyll science is facilitated by core modeling and PDE discretization advances, including automated and adaptive gridding for relevant sets of parameterized geometries that are properly matched to the equation discretization methods. The project will employ modern software engineering practices to produce scalable, secure, and high-fidelity physics-based software.This award by the Office of Advanced Cyberinfrastructure is jointly supported by the Division of Physics within the NSF Directorate for Mathematical and Physical Sciences, and the Division of Atmospheric and Geospace Sciences and the Division of Research, Innovation, Synergies, and Education within the NSF Directorate for Geosciences.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.