将流体领域机器学习经验迁移至等离子体模拟,推动高效建模与优化。
Machine Learning Applications to Computational Plasma Physics and Reduced-Order Plasma Modeling: A Perspective
- 借鉴流体动力学中机器学习方法,构建等离子体计算新范式。
- 强调需高保真、低成本仿真生成大规模训练数据以支撑模型。
- 适合等离子体物理、工程控制及计算科学交叉研究者参考。
机器学习(ML)为从仿真和实验数据中提取可解释的科学知识提供了丰富工具,增强领域认知。同时,机器学习增强的数值建模能革新复杂工程系统的科学计算,实现对技术运行的深入分析与自动优化控制。近年来,机器学习在流体力学等领域应用迅速发展,显著提升流场模拟能力;但在数值等离子体物理研究中仍处于初步阶段。鉴于流体力学与等离子体物理的紧密关联,本文旨在制定将流体建模中的机器学习进展迁移至等离子体计算的路线图。首先概述机器学习基本范式及其可解决的问题类型,并回顾其在计算流体动力学中的典型案例。随后梳理机器学习在等离子体物理中的近期应用。最后探讨未来发展方向与挑战,特别指出需开发成本可控的高保真仿真工具以支持大规模数据生成,从而释放机器学习在等离子体建模中的全部潜力。
原文摘要 · Abstract (English)
Machine learning (ML) provides a broad spectrum of tools and architectures that enable the transformation of data from simulations and experiments into useful and explainable science, thereby augmenting domain knowledge. Furthermore, ML-enhanced numerical modelling can revamp scientific computing for real-world complex engineering systems, creating unique opportunities to examine the operation of the technologies in detail and automate their optimization and control. In recent years, ML applications have seen significant growth across various scientific domains, particularly in fluid mechanics, where ML has shown great promise in enhancing computational modeling of fluid flows. In contrast, ML applications in numerical plasma physics research remain relatively limited in scope and extent. Despite this, the close relationship between fluid mechanics and plasma physics presents a valuable opportunity to create a roadmap for transferring ML advances in fluid flow modeling to computational plasma physics. This Perspective aims to outline such a roadmap. We begin by discussing some general fundamental aspects of ML, including the various categories of ML algorithms and the different types of problems that can be solved with the help of ML. With regard to each problem type, we then present specific examples from the use of ML in computational fluid dynamics, reviewing several insightful prior efforts. We also review recent ML applications in plasma physics for each problem type. The paper discusses promising future directions and development pathways for ML in plasma modelling within the different application areas. Additionally, we point out prominent challenges that must be addressed to realize ML's full potential in computational plasma physics, including the need for cost-effective high-fidelity simulation tools for extensive data generation.
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