Collisional rate calculations which account for relative multifluid streaming were implemented in a collisional-radiative model that is applicable for a generalized set of atomic elements. The rate modifications for multifluid streaming were derived in two recent studies for electron-impact excitation, de-excitation, ionization, and recombination [H. P. Le and J.-L. Cambier, Phys. Plasmas 22, 093512 (2015); 23, 063505 (2016)]. This study follows from the previous studies by extending the derivations to radiative recombination. However, the memory intensive aspect of expanding the collisional rate tabulations to temperature and multifluid effects can become a numerical obstacle for large-scale plasma simulations. The main objective of this study is to explore reduced-order modeling approaches for collisional-radiative systems that may adopt collisional rate accounting for multifluid streaming. The ionization test case simulated in this work uses the quasi-steady-state solution and two Boltzmann grouping approaches, one of which is the ionic excitation concept and the other being a relatively finer selection of Boltzmann groups. The reduced-order models captured the general trend of the detailed model, providing a foundation from which to improve or perform coupled plasma simulations in the future.

中文翻译：

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由于多流体碰撞辐射效应造成的等离子体电离的降阶建模

在碰撞辐射模型中实现了解释相对多流体流的碰撞速率计算，该模型适用于广义的原子元素集。最近在两项有关电子碰撞激发，去激发，电离和重组的研究中，对多流体流的速率进行了修改[HP Le和J.-L.，2003，6，2，3]。坎比尔，物理学。等离子体22，093512（2015）; 23，063505（2016）]。这项研究是在以前的研究基础上进行的，将推导扩展到了辐射重组。但是，将碰撞率列表扩展到温度和多流体效应的内存密集型方面可能成为大规模等离子体模拟的数字障碍。这项研究的主要目的是探索碰撞辐射系统的降阶建模方法，该方法可能采用碰撞速率考虑来进行多流体流传输。在这项工作中模拟的电离测试用例使用准稳态解和两种Boltzmann分组方法，其中一种是离子激发概念，另一种是相对更精细的Boltzmann组选择。降阶模型反映了详细模型的总体趋势，