无条件稳定的好假设相对论粒子推动器

IF 7.2 2区物理与天体物理 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computer Physics Communications Pub Date : 2024-05-28 DOI:10.1016/j.cpc.2024.109263

Xiang-Ren Zhou, Li Zhang

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引用次数: 0

摘要

粒子在胞（PIC）模拟中广泛使用的粒子推动器通常要求无条件稳定并符合基本物理定律。在这项工作中，我们基于中心差分，提出了一种无条件稳定且姿态良好的粒子推动器。通过数学推导，将求解张量形式相对论洛伦兹力定律方程的高维非线性问题转化为四元标量问题和下面的线性问题。此外，还给出了一些实用的编程建议和一些数值结果。

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An unconditionally-stable well-posed relativistic particle pusher

Particle pushers widely used in Particle-in-Cell(PIC) simulations are commonly required to be unconditionally stable and meet the basic physical laws. In this work, basing on central difference, we propose an unconditionally stable and well posed particle pusher. By mathematical deduction, the high-dimensional non-linear problem for solving tensor-form relativistic Lorentz force law equation is transformed to a quartic scalar problem and a following linear problem. Some practical suggestions for programming and some numerical results are also given.

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来源期刊

Computer Physics Communications 物理-计算机：跨学科应用

CiteScore

12.10

自引率

3.20%

发文量

287

审稿时长

5.3 months

期刊介绍： The focus of CPC is on contemporary computational methods and techniques and their implementation, the effectiveness of which will normally be evidenced by the author(s) within the context of a substantive problem in physics. Within this setting CPC publishes two types of paper. Computer Programs in Physics (CPiP) These papers describe significant computer programs to be archived in the CPC Program Library which is held in the Mendeley Data repository. The submitted software must be covered by an approved open source licence. Papers and associated computer programs that address a problem of contemporary interest in physics that cannot be solved by current software are particularly encouraged. Computational Physics Papers (CP) These are research papers in, but are not limited to, the following themes across computational physics and related disciplines. mathematical and numerical methods and algorithms; computational models including those associated with the design, control and analysis of experiments; and algebraic computation. Each will normally include software implementation and performance details. The software implementation should, ideally, be available via GitHub, Zenodo or an institutional repository.In addition, research papers on the impact of advanced computer architecture and special purpose computers on computing in the physical sciences and software topics related to, and of importance in, the physical sciences may be considered.