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arXiv 2302.01993physics.plasm-ph
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ALLIANCE:用于动理学等离子体湍流的光谱求解器

ALLIANCE: Spectral solver for kinetic plasma turbulence

Evgeny A. Gorbunov, Bogdan Teaca

AI总结:

本文介绍ALLIANCE代码,用于求解四维电磁漂移动理学方程,采用Fourier-Laguerre-Hermite光谱形式和伪光谱方法,适用于天体物理等离子体湍流级联研究,并完成了验证与基准测试。

摘要:

ALLIANCE代码的开发旨在求解平板几何中一组新的四维电磁漂移动理学方程[J. Plasma Phys. 88 905880117 (2022)]。这些非线性方程适用于研究与离子回旋半径相当或更大尺度上的磁化等离子体系统。特别是,它适合研究天体物理等离子体中的动理学湍流级联,同时在流体-动理学过渡区保留有限拉莫尔半径效应。所求解的方程采用光谱Fourier-Laguerre-Hermite形式,非线性项采用伪光谱方法处理,代码在多个方向上实现了并行化。在介绍代码之后,展示了验证运行结果,并给出了串行和并行计算的基准测试。

英文摘要:

The ALLIANCE code is developed to solve a new set of four-dimensional electromagnetic drift-kinetic equations in slab geometry [J. Plasma Phys. 88 905880117 (2022)]. The nonlinear equations are useful for the study of magnetized plasma systems at scales comparable to, or larger than the ion gyroradius. In particular, it is suited for the study the kinetic turbulent cascade in astrophysical plasma, while preserving finite Larmor radius effects at the fluid-kinetic transition. The equations solved are in spectral Fourier-Laguerre-Hermite form, a pseudo-spectral approach is used for the nonlinear terms, and the code is parallelised over multiple directions. After a presentation of the code, validation runs are shown, and benchmarks for serial and parallel computations are presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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