A HYBRID SOLAR WIND MODEL OF THE CESE plus HLL METHOD WITH A YIN-YANG OVERSET GRID AND AN AMR GRID

	A HYBRID SOLAR WIND MODEL OF THE CESE plus HLL METHOD WITH A YIN-YANG OVERSET GRID AND AN AMR GRID
	Feng, Xueshang; Zhang, Shaohua; Xiang, Changqing; Yang, Liping; Jiang, Chaowei; Wu, S. T.
刊名	ASTROPHYSICAL JOURNAL
	2011
卷号	734 期号:1 页码:50
关键词	magnetohydrodynamics (MHD) methods: numerical solar wind Sun: heliosphere
ISSN号	0004-637X
通讯作者	Feng, XS (reprint author), Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
中文摘要	A hybrid three-dimensional (3D) MHD model for solar wind study is proposed in the present paper with combined grid systems and solvers. The computational domain from the Sun to Earth space is decomposed into the near-Sun and off-Sun domains, which are respectively constructed with a Yin-Yang overset grid system and a Cartesian adaptive mesh refinement (AMR) grid system and coupled with a domain connection interface in the overlapping region between the near-Sun and off-Sun domains. The space-time conservation element and solution element method is used in the near-Sun domain, while the Harten-Lax-Leer method is employed in the off-Sun domain. The Yin-Yang overset grid can avoid well-known singularity and polar grid convergence problems and its body-fitting property helps achieve high-quality resolution near the solar surface. The block structured AMR Cartesian grid can automatically capture far-field plasma flow features, such as heliospheric current sheets and shock waves, and at the same time, it can save significant computational resources compared to the uniformly structured Cartesian grid. A numerical study of the solar wind structure for Carrington rotation 2069 shows that the newly developed hybrid MHD solar wind model successfully produces many realistic features of the background solar wind, in both the solar corona and interplanetary space, by comparisons with multiple solar and interplanetary observations.
英文摘要	A hybrid three-dimensional (3D) MHD model for solar wind study is proposed in the present paper with combined grid systems and solvers. The computational domain from the Sun to Earth space is decomposed into the near-Sun and off-Sun domains, which are respectively constructed with a Yin-Yang overset grid system and a Cartesian adaptive mesh refinement (AMR) grid system and coupled with a domain connection interface in the overlapping region between the near-Sun and off-Sun domains. The space-time conservation element and solution element method is used in the near-Sun domain, while the Harten-Lax-Leer method is employed in the off-Sun domain. The Yin-Yang overset grid can avoid well-known singularity and polar grid convergence problems and its body-fitting property helps achieve high-quality resolution near the solar surface. The block structured AMR Cartesian grid can automatically capture far-field plasma flow features, such as heliospheric current sheets and shock waves, and at the same time, it can save significant computational resources compared to the uniformly structured Cartesian grid. A numerical study of the solar wind structure for Carrington rotation 2069 shows that the newly developed hybrid MHD solar wind model successfully produces many realistic features of the background solar wind, in both the solar corona and interplanetary space, by comparisons with multiple solar and interplanetary observations.
学科主题	空间物理
收录类别	SCI
资助信息	National Natural Science Foundation of China [41031066, 40921063, 40874091, 40890162, 40904050, 40874077, 41074121, 41074122]; Specialized Research Fund for State Key Laboratories; AFOSR [FA9550-07-1-0468]; NSO [C10569A, AST 0132798]; NSF [ATM-0754378]; NASA/AISR [NNG04GP79G]; NASA; National Science Foundation (USA)
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3291]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Feng, Xueshang,Zhang, Shaohua,Xiang, Changqing,et al. A HYBRID SOLAR WIND MODEL OF THE CESE plus HLL METHOD WITH A YIN-YANG OVERSET GRID AND AN AMR GRID[J]. ASTROPHYSICAL JOURNAL,2011,734(1):50.
APA	Feng, Xueshang,Zhang, Shaohua,Xiang, Changqing,Yang, Liping,Jiang, Chaowei,&Wu, S. T..(2011).A HYBRID SOLAR WIND MODEL OF THE CESE plus HLL METHOD WITH A YIN-YANG OVERSET GRID AND AN AMR GRID.ASTROPHYSICAL JOURNAL,734(1),50.
MLA	Feng, Xueshang,et al."A HYBRID SOLAR WIND MODEL OF THE CESE plus HLL METHOD WITH A YIN-YANG OVERSET GRID AND AN AMR GRID".ASTROPHYSICAL JOURNAL 734.1(2011):50.