| Implementation of neutralizing fields for particle-particle simulations using like charges | |
| Zhao, Yinjian1,2; Cui, Chen1; Zhang, Yanan3; Hu Y(胡远)4 | |
| Corresponding Author | Hu, Yuan([email protected]) |
| Source Publication | JOURNAL OF PLASMA PHYSICS
 |
| 2021-07-07 | |
| Volume | 87Issue:3Pages:16 |
| ISSN | 0022-3778 |
| Abstract | 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. |
| Keyword | plasma simulation strongly coupled plasmas plasma dynamics |
| DOI | 10.1017/S002237782100060X |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000670336600001 |
| WOS Keyword | TEMPERATURE RELAXATION ; COEFFICIENTS ; COLLISIONS |
| WOS Research Area | Physics |
| WOS Subject | Physics, Fluids & Plasmas |
| Funding Project | LHD Youth Innovation Fund from the State Key Laboratory of High Temperature Gas Dynamics[LHD2019CX12] |
| Funding Organization | LHD Youth Innovation Fund from the State Key Laboratory of High Temperature Gas Dynamics |
| Classification | Q3 |
| Ranking | 1 |
| Contributor | Hu, Yuan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87007 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Hu, Yuan |
| 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. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2021F271.pdf（1785KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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