Simulation Study of Space Plasma Physics

空间等离子体物理模拟研究

• 批准号: 9815809
• 负责人: Wendell Horton
• 金额: $ 20.06万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-15 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9815809&HistoricalAwards=false
• 关键词: Simulation; Study; Space; Plasma; Physics

The investigators seek to understand the large-scale dynamics of solar flux tubes that lead to the morphology and evolution of active regions. Flux tube buoyancy is influenced by the rotation rate of the Sun (or star). Shear flows and shear rotation can enhance the accumulation of magnetic energy and thus its release. The orientation of currents in the flux tubes, as well as helicity of the magnetic field is also important in emergence of flux and interaction of flux tubes. The main effort is to employ analytical methods and numerical simulations to illuminate the effects of differential solar rotation on flux emergence and flux tube reconnection. Computational and theoretic results will be corroborated by observations from the Yokoh and SOHO spacecraft.

研究人员试图了解导致活动区形态和演化的太阳通量管的大规模动力学。通量管浮力受太阳(或恒星)自转速度的影响。剪切流动和剪切旋转可以增强磁能的积累，从而促进磁能的释放。通量管中电流的取向以及磁场的螺旋度对通量的产生和通量管之间的相互作用也是重要的。主要工作是利用解析方法和数值模拟来阐明太阳自转差对通量浮现和通量管重联的影响。计算和理论结果将得到来自Yokoh和SOHO航天器的观测证实。