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2.5维自适应磁场重联MHD模式
Alternative Title2.5D AMR MHD Magnetic Reconnection Model
张绍华; 冯学尚; 杨利平; shzhang@mail.iggcas.ac.cn
Department空间科学部
Source Publication空间科学学报
2012
Volume32Issue:6Pages:785-792
ISSN0254-6124
Language中文
Keyword自适应 磁场重联 Mhd数值模拟
Abstract磁雷诺数(R_m)是影响磁场重联的重要因素。真实的物理环境中Rm往往很高,例如,在行星际空间和太阳日冕中Rm通常大于10~4量级。高R_m条件下的磁重联表现出很多异常特性,然而高R_m条件下的磁场重联数值模拟需要很高的时空分辨率,否则很难分辨出重联过程中形成的薄电流片。本文基于自适应软件包PARAMESH将并行自适应网格技术引入磁场重联数值模拟,建立了一个2.5维自适应磁场重联MHD模式,研究高磁雷诺数条件下重联的动态演化过程,进而将不同磁雷诺数的参数进行对比研究。结果表明,该模式可以自动捕捉到磁场重联产生的奇性电流片,高磁雷诺数条件下产生的慢激波结构可提供一种快速磁能释放机制。
Other AbstractMagnetic reconnection is one of the hot topics in space physics. The magnetic Lundquist number can influence the magnetic reconnection process drastically. Magnetic Lundquist number is always very large in many real physical environments, for example, higher than 10~4 in interplanetary space and solar corona. Magnetic reconnection with enormously large Lundquist number behaves many new characteristics, while magnetic reconnection simulation needs very high grid resolution, or it can't resolve the thin current sheets formed in the magnetic reconnection. With the help of the Adaptive Mesh Refinement (AMR) package named PARAMESH, AMR technique was introduced into magnetic reconnection simulations and a two and half dimensional (2.5D) AMR magnetic recon-nection model was developed. The dynamic reconnection process with different magnetic Lundquist numbers was studied. The results showed that this model can automatically capture the near-singular current sheets with the development of the magnetic reconnection and the slow-mode shock structures formed in the magnetic reconnection process with high magnetic Lundquist number provide a possible way for fast magnetic energy conversion.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3039
Collection空间科学部
Corresponding Authorshzhang@mail.iggcas.ac.cn
Recommended Citation
GB/T 7714
张绍华,冯学尚,杨利平,等. 2.5维自适应磁场重联MHD模式[J]. 空间科学学报,2012,32(6):785-792.
APA 张绍华,冯学尚,杨利平,&shzhang@mail.iggcas.ac.cn.(2012).2.5维自适应磁场重联MHD模式.空间科学学报,32(6),785-792.
MLA 张绍华,et al."2.5维自适应磁场重联MHD模式".空间科学学报 32.6(2012):785-792.
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