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首页> 外文期刊>The Astrophysical Journal. Supplement Series >FORNAX: A Flexible Code for Multiphysics Astrophysical Simulations
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FORNAX: A Flexible Code for Multiphysics Astrophysical Simulations

机译：fornax：多体性天体物理模拟的灵活代码

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摘要

This paper describes the design and implementation of our new multigroup, multidimensional radiation hydrodynamics code FORNAX and provides a suite of code tests to validate its application in a wide range of physical regimes. Instead of focusing exclusively on tests of neutrino radiation hydrodynamics relevant to the core-collapse supernova problem for which FORNAX is primarily intended, we present here classical and rigorous demonstrations of code performance relevant to a broad range of multidimensional hydrodynamic and multigroup radiation hydrodynamic problems. Our code solves the comoving-frame radiation moment equations using the M1 closure, utilizes conservative high-order reconstruction, employs semi-explicit matter and radiation transport via a high-order time stepping scheme, and is suitable for application to a wide range of astrophysical problems. To this end, we first describe the philosophy, algorithms, and methodologies of FORNAX and then perform numerous stringent code tests that collectively and vigorously exercise the code, demonstrate the excellent numerical fidelity with which it captures the many physical effects of radiation hydrodynamics, and show excellent strong scaling well above 100,000 MPI tasks.
机译：本文介绍了我们新的MultiDimuoup，多维辐射流体动力学代码ForNax的设计和实现，并提供了一套代码测试，以验证其在广泛的实体制度中的应用。而不是专注于与Fornax主要预期的核心崩溃超新加达问题相关的中微子辐射流体动力学的测试，而是在这里提供与广泛的多维流体动力学和多群辐射流体动力学问题相关的代码性能的经典和严谨的演示。我们的代码解决了使用M1闭合的Comoving-Frame辐射力矩方程，利用保守的高阶重建，通过高阶时间步进方案采用半显式物质和辐射运输，适用于应用于各种天体物理问题。为此，我们首先描述Fornax的哲学，算法和方法，然后执行众多严格的代码测试，统称和大力锻炼代码，展示了优异的数字保真度，它捕获了辐射流体动力学的许多物理效果，并显示优异的强大比较远高于100,000 MPI任务。

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