中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
DOI10.1016/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

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