| Implementation of neutralizing fields for particle-particle simulations using like charges | |
| Zhao, Yinjian1,2; Cui, Chen1; Zhang, Yanan3; Hu Y(胡远)4 | |
| 通讯作者 | Hu, Yuan(yhu@imech.ac.cn) |
| 发表期刊 | JOURNAL OF PLASMA PHYSICS
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| 2021-07-07 | |
| 卷号 | 87期号:3页码:16 |
| ISSN | 0022-3778 |
| 摘要 | The particle-particle (PP) model has a growing number of applications in plasma simulations, because of its high accuracy of solving Coulomb collisions. One of the main issues restricting the practical use of the PP model is its large computational cost, which is now becoming acceptable thanks to state-of-art parallel computing techniques. Another issue is the singularity that occurs when two particles are too close. The most effective approach of avoiding the singularity would be to simulate particles with only like charges plus a neutralizing field, such that the short-range collisions are equivalent to those of using unlike charges. In this paper, we introduce a way of adding the neutralizing field by using the analytical solution of the electric field in the domain filled with uniformly distributed charges, for applications with homogeneous and quasi-neutral plasmas under a reflective boundary condition. Two most common Cartesian domain geometries, cubic and spherical, are considered. The model is verified by comparing simulation results with an analytical solution of an electron-ion temperature relaxation problem, and a corresponding simulation using unlike charges. In addition, it is found that a PP simulation using like charges can achieve a significant speed-up of 100 compared with a corresponding simulation using unlike charges, due to the capability of using larger time steps while maintaining the same energy conservation. |
| 关键词 | plasma simulation strongly coupled plasmas plasma dynamics |
| DOI | 10.1017/S002237782100060X |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000670336600001 |
| 关键词[WOS] | TEMPERATURE RELAXATION ; COEFFICIENTS ; COLLISIONS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Fluids & Plasmas |
| 资助项目 | LHD Youth Innovation Fund from the State Key Laboratory of High Temperature Gas Dynamics[LHD2019CX12] |
| 项目资助者 | LHD Youth Innovation Fund from the State Key Laboratory of High Temperature Gas Dynamics |
| 论文分区 | Q3 |
| 力学所作者排名 | 1 |
| RpAuthor | Hu, Yuan |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/87007 |
| 专题 | 高温气体动力学国家重点实验室 |
| 作者单位 | 1.Univ Southern Calif, Los Angeles, CA 90007 USA; 2.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA; 3.Arizona State Univ, Tempe, AZ 85281 USA; 4.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yinjian,Cui, Chen,Zhang, Yanan,et al. Implementation of neutralizing fields for particle-particle simulations using like charges[J]. JOURNAL OF PLASMA PHYSICS,2021,87,3,:16. |
| APA | Zhao, Yinjian,Cui, Chen,Zhang, Yanan,&胡远.(2021).Implementation of neutralizing fields for particle-particle simulations using like charges.JOURNAL OF PLASMA PHYSICS,87(3),16. |
| MLA | Zhao, Yinjian,et al."Implementation of neutralizing fields for particle-particle simulations using like charges".JOURNAL OF PLASMA PHYSICS 87.3(2021):16. |
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| Jp2021F271.pdf（1785KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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