Magnetohydrodynamic simulations of turbulent magnetic reconnection
文献类型：期刊论文
| 作者 | Fan QL(范全林) ; Feng XS(冯学尚) ; Xiang ZQ(向长青) |
| 刊名 | Magnetohydrodynamic simulations of turbulent magnetic reconnection
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| 出版日期 | 2004 |
| 卷号 | 11期号:12页码:5605-5614 |
| 关键词 | explosive events solar-wind transition region current sheets active region quiet sun dynamics resistivity field jets |
| ISSN号 | 1070-664X |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | Turbulent reconnection process in a one-dimensional current sheet is investigated by means of a two-dimensional compressible one-fluid magnetohydrodynamic simulation with spatially uniform, fixed resistivity. Turbulence is set up by adding to the sheet pinch small but finite level of broadband random-phased magnetic field components. To clarify the nonlinear spatial-temporal nature of the turbulent reconnection process the reconnection system is treated as an unforced initial value problem without any anomalous resistivity model adopted. Numerical results demonstrate the duality of turbulent reconnection, i.e., a transition from Sweet-Parker-like slow reconnection to Petschek-like fast reconnection in its nonlinear evolutionary process. The initial slow reconnection phase is characterized by many independent microreconnection events confined within the sheet region and a global reconnection rate mainly dependent on the initially added turbulence and insensitive to variations of the plasma beta and resistivity. The formation and amplification of the major plasmoid leads the following reconnection process to a rapid reconnection stage with a fast reconnection rate of the order of 0.1 or even larger, drastically changing the topology of the global magnetic field. That is, the presence of magnetohydrodynamic turbulence in large-scale current sheets can raise the reconnection rate from small values on the order of the Sweet-Parker rate to high values on the order of the Petscheck rate through triggering an evolution toward fast magnetic reconnection. Meanwhile, the backward coupling between the small- and large-scale magnetic field dynamics has been properly represented through the present high resolution simulation. The undriven turbulent reconnection model established here expresses a solid numerical basis for the previous schematic two-step magnetic reconnection models and a possible explanation of two-stage energy release process of solar explosives. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 原文出处 | http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHPAEN000011000012005605000001&idtype=cvips&prog=normal |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1024]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Fan QL,Feng XS,Xiang ZQ. Magnetohydrodynamic simulations of turbulent magnetic reconnection[J]. Magnetohydrodynamic simulations of turbulent magnetic reconnection,2004,11(12):5605-5614. |
| APA | 范全林,冯学尚,&向长青.(2004).Magnetohydrodynamic simulations of turbulent magnetic reconnection.Magnetohydrodynamic simulations of turbulent magnetic reconnection,11(12),5605-5614. |
| MLA | 范全林,et al."Magnetohydrodynamic simulations of turbulent magnetic reconnection".Magnetohydrodynamic simulations of turbulent magnetic reconnection 11.12(2004):5605-5614. |
入库方式： OAI收割
来源：国家空间科学中心
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