Magnetic Energy of Force-Free Fields with Detached Field Lines中国天文和天体物理学报：英文版论文
【题名】：Magnetic Energy of Force-Free Fields with Detached Field Lines中国天文和天体物理学报：英文版论文(Magnetic Energy of Force-Free Fields with Detached Field LinesZhongGuoTianWenHeTianTiWuLiXueBao：YingWenBanLunWen) 【关键词】：轴对称 理想模型 磁性 喷出物 数字模拟 【keywords】：ZhouDuiCheng LiXiangMoXing CiXing PenChuWu ShuZiMoNi 【作者】：Guo-QiangLi You-QiuHu      【来源】： 知识词典 【期刊名称】：中国天文和天体物理学报：英文版(ZhongGuoTianWenHeTianTiWuLiXueBao：YingWenBan) 【国际标准刊号】：1009-9271        【国内统一刊号】：11-4631 【作者单位】：SchoolofEarthandSpaceSciences,UniversityofScienceandTechnologyofChina,Hefei230026(SchoolofEarthandSpaceSciences,UniversityofScienceandTechnologyofChina,Hefei230026) 【分类号】：P142      【页码】：-555-562      【出版年】：2003.6 【下载地址】：下载pdf全文         Using an axisymmetrical ideal MHD model in spherical coordinates, we present a numerical study of magnetic configurations characterized by a levitating flux rope embedded in a bipolar background field whose normal field at the solar surface is the same or very close to that of a central dipole. The characteristic plasma β (the ratio between gas pressure and magnetic pressure) is taken to be sosmall (β= 10^-4) that the magnetic field is close to being force-free. The system as a whole is then let evolve quasi-statically with a slow increase of either the annular magnetic flux or the axial magnetic flux of the rope, and the total magneticenergy of the system grows accordingly. It is found that there exists an energy threshold: the flux rope sticks to the solar surface in equilibrium if the magneticenergy of the system is below the threshold, whereas it loses equilibrium if the threshold is exceeded. The energy threshold is found to be larger than that of thecorresponding fully-open magnetic field by a factor of nearly 1.08 irrespective as towhether the background field is completely closed or partly open, or whether the magnetic energy is enhanced by an increase of annular or axial flux of the rope.This gives an example showing that a force-free magnetic field may have an energy larger than the corresponding open field energy if part of the field lines is allowed tobe detached from the solar surface. The implication of such a conclusion in coronal mass ejections is briefly discussed and some comments are made on the maximum energy of force-free magnetic fields.
	【相关文献】
Magnetic Energy of Force-Free Fields with Detached Field Lines - 中国天文和天体物理学报：英文版 - Guo-QiangLi You-QiuHu New Approaches and Solutions of Nonlinear Force-Free Magnetic Field - 理论物理通讯：英文版 - XIE Bai-Song[1,2,3] Two New Solutions of Non-constant-α Force-Free Magnetic Field - 理论物理通讯：英文版 - XIE Bai-Song[1,2,3] A Fluid Dynamics Approach for the Computation of Non—linear Force—Free Magnetic Field - 中国天文和天体物理学报：英文版 - jing-QunLi,Jing-XiuWang,Feng-SiWei, Contribution of Disclination Lines to Free Energy of Liquid Crystals in Single-Elastic Constant Approximation - 理论物理通讯：英文版 - YANGGuo-Hong,WANGYu-Sheng,DUANYi-Shi, Effect of Disclination Lines on Free Energy of Nematic Liquid Crystals - 理论物理通讯：英文版 - YANG Guo-Hong,ZHANG Hui,TIAN Li-Jun,WANG Yu-Sheng,DUAN Yi-Shi, MHD Instability Analysis of Liquid Metal Free Surface Jet Flow in Non-Uniform Magnetic Fields - 核工业西南物理研究院年报：英文版 - XUZengyu KANGWeishan PANChuanjie MHD Instability Analysis of Liquid Metal Free Surface Jet Flow in Non-Uniform Magnetic Fields （Part Ⅱ） - 核工业西南物理研究院年报：英文版 - XUZenyu KANGWeishan PANChuanjie DENHongyin ZHANGYanxu Analysis on MHD Stability of Free Surface Jet flow in a Gradient Magnetic Fields - 等离子体科学和技术：英文版 - 许增裕 康伟山 潘传杰 Modeling Density and Anisotropy of Energetic Electrons Along Magnetic Field Lines - 等离子体科学和技术：英文版 - 肖伏良[1,2] 冯学尚, Relationship between the magnetic field distribution and attractive force of single-domain YBCO bulk under different field cooling processes - 中国物理：英文版 - 杨万民,周廉,冯勇,张平祥,R.Nicolsky, Calculation of electric field effects on the Gibbs free energy of the Al-Li-Mg alloy - 稀有金属：英文版 - ZHANG Jianjun CHEN Zheng WANG Yongxin LIU Bing LI Yongsheng Two—Electron Energy Spectrum in a Parabolic Quantum Dot Under a Magnetic Field - 理论物理通讯：英文版 - XIEWen－Fang Neutrino energy loss by electron capture in magnetic field at the crusts of neutron stars - 中国物理C：英文版 - 刘晶晶 罗志全 An Analysis of Magnetic Field Environment Near High—Voltage Power Lines and Contact Wires of Electric Railways - 中国邮电高校学报：英文版 - LILi,GAOYou－gang,
[baidu搜索]：轴对称 理想模型 磁性 喷出物 数字模拟 [google搜索]：轴对称 理想模型 磁性 喷出物 数字模拟 [sogou搜索]：轴对称 理想模型 磁性 喷出物 数字模拟 [yahoo搜索]：轴对称 理想模型 磁性 喷出物 数字模拟 [soso搜索]：轴对称 理想模型 磁性 喷出物 数字模拟 [有道搜索]：轴对称 理想模型 磁性 喷出物 数字模拟