An efficient parallel semi-implicit solver for anisotropic thermal conduction in the solar corona
文献类型:期刊论文
作者 | Ye J(叶景)1,2; Shen, Chengcai3; Lin J(林隽)1,2,4; Mei ZX(梅志星)1,2 |
刊名 | Astronomy and Computing |
出版日期 | 2020-01 |
卷号 | 30 |
ISSN号 | 2213-1337 |
关键词 | Magnetohydrodynamics Spitzer Conductivity Anisotropic Diffusion Numerical Methods Parallel Algorithm |
DOI | 10.1016/j.ascom.2019.100341 |
产权排序 | 第1完成单位 |
文献子类 | Journal article (JA) |
英文摘要 | Anisotropic thermal conduction plays an important role in determining the structure of the hot plasma in the solar corona. When hot plasma appears, the conductivity rises with temperature and becomes highly nonlinear. Explicit solvers for parabolic problems often lead to much smaller time-steps limited by a Courant–Friedrichs–Lewy (CFL) condition in comparison with hyperbolic Magnetohydrodynamics (MHD) equations. In this work, we present a pseudo-linear, directionally-split, semi-implicit method allowing for large time-steps as well as the optimized parallelization algorithm, integrated with the MHD solver. Our scheme can perfectly preserve the monotonicity and the geometry of shocks and discontinuities in complex MHD problems.Two sets of numerical tests show that an increase in time step of $\sim 600$ can be easily achieved with an acceptable error by our scheme compared to explicit methods, and the use of large time-steps can still follow fast dynamic processes reliably. In addition, the extendibility studies have proven that the associated parallel efficiency is comparably high. This method is also useful for any kind of time-dependent conductivity problems for the solar applications in the future. |
学科主题 | 数学 ; 太阳物理学 |
URL标识 | 查看原文 |
资助项目 | NSFC[11603070] ; NSFC[11333007] ; NSFC[U1631130] ; NSFC[11933009] ; CAS[QYZDJ-SSWSLH012] ; CAS[XDA15010900] ; Strategic Priority Research Program of CAS[XDA17040507] ; project of the Group for Innovation of Yunnan Province ; Yunnan Ten-Thousand Talents Plan-Yunling Scholar Project ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)[U1501501] ; National Science Foundation of U.S.[AGS-1358342] ; National Science Foundation of U.S.[AGS-17233135] ; National Science Foundation of U.S.[AGS-1723425] |
语种 | 英语 |
出版者 | Elsevier B.V. |
资助机构 | NSFC[11603070, 11333007, U1631130, 11933009] ; CAS[QYZDJ-SSWSLH012, XDA15010900] ; Strategic Priority Research Program of CAS[XDA17040507] ; project of the Group for Innovation of Yunnan Province ; Yunnan Ten-Thousand Talents Plan-Yunling Scholar Project ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)[U1501501] ; National Science Foundation of U.S.[AGS-1358342, AGS-1723313, AGS-1723425] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21187] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Ye J(叶景) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, China 2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China 3.Smithsonian Astrophysical Observatory, 60 Garden Street, MS 15, Cambridge, MA 02138, US 4.University of Chinese Academy of Sciences, Beijing 100049, China |
推荐引用方式 GB/T 7714 | Ye J,Shen, Chengcai,Lin J,et al. An efficient parallel semi-implicit solver for anisotropic thermal conduction in the solar corona[J]. Astronomy and Computing,2020,30. |
APA | Ye J,Shen, Chengcai,Lin J,&Mei ZX.(2020).An efficient parallel semi-implicit solver for anisotropic thermal conduction in the solar corona.Astronomy and Computing,30. |
MLA | Ye J,et al."An efficient parallel semi-implicit solver for anisotropic thermal conduction in the solar corona".Astronomy and Computing 30(2020). |
入库方式: OAI收割
来源:云南天文台
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。