The ExaStar project aims to deliver an efficient, versatile, and portable software ecosystem for multi-physics astrophysics simulations run on exascale machines. The code suite is a component-based multi-physics toolkit, built on the capabilities of current simulation codes (in particular Flash-X and Castro), and based on the massively parallel adaptive mesh refinement framework AMReX. It includes modules for hydrodynamics, advanced radiation transport, thermonuclear kinetics, and nuclear microphysics. The code will reach exascale efficiency by building upon current multi- and many-core packages integrated into an orchestration system that uses a combination of configuration tools, code translators, and a domain-specific asynchronous runtime to manage performance across a range of platform architectures. The target science includes multi-physics simulations of astrophysical explosions (such as supernovae and neutron star mergers) to understand the cosmic origin of the elements and the fundamental physics of matter and neutrinos under extreme conditions.

ExaStar 项目旨在为在百亿亿级机器上运行的多物理场天体物理学模拟提供高效、多功能和便携的软件生态系统。该代码套件是一个基于组件的多物理工具包，建立在当前仿真代码（特别是Flash-X和Castro）的能力之上，并基于大规模并行自适应网格细化框架AMReX. 它包括流体动力学、高级辐射传输、热核动力学和核微物理学模块。该代码将构建在当前集成到编排系统中的多核和众核包的基础上，该系统使用配置工具、代码翻译器和特定于域的异步运行时的组合来管理跨一系列平台架构的性能，从而达到百亿亿级的效率。目标科学包括天体物理爆炸（如超新星和中子星合并）的多物理场模拟，以了解元素的宇宙起源以及极端条件下物质和中微子的基本物理学。