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首页> 外文期刊>Journal of Computational Physics >A corrected method for Coulomb scattering in arbitrarily weighted particle-in-cell plasma simulations
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A corrected method for Coulomb scattering in arbitrarily weighted particle-in-cell plasma simulations

机译：任意加权粒子细胞血浆模拟中对库仑散射的校正方法

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摘要

A physically and statistically accurate method to perform binary, pairwise Coulomb collisions for arbitrarily-weighted macroparticles in particle-in-cell simulations is described. The method is shown to conserve global energy and momentum on average and to produce physically accurate scattering frequencies. This is justified using the statistically expected values of the method and through a series of numerical tests showing that the method is valid independently of macroparticle weight. This novel method is required due to an error in previous work on binary scattering, initially by Nanbu and Yonemura (1998) [11] and applied to subsequent work, that causes inaccuracies in the scattering frequencies for unequally weighted simulations; a problem that occurs both for scattering within the group and between different groups. (C) 2020 Elsevier Inc. All rights reserved.
机译：描述了用于在细胞内模拟中对任意加权宏颗粒进行的二元进行二进制的物理和统计准确的方法。 该方法被示出为平均节省全球能量和动量，并产生物理准确的散射频率。 这是用方法的统计预期值和通过一系列数值测试的合理性，表明该方法独立于宏观力重量有效。 由于先前的二进制散射的误差，最初由南巴和yonemura（1998）[11]的误差，并应用于随后的工作，这是一种新的方法，并对未来加权模拟的散射频率导致不准确的差异; 用于在组内和不同组之间散射的问题。 （c）2020 Elsevier Inc.保留所有权利。

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