Three-Dimensional Hybrid Simulation and Analytic Study of the Evolution of Alfven Waves in the Corona and Solar Wind

日冕和太阳风中阿尔文波演化的三维混合模拟与分析研究

• 批准号: 9902904
• 负责人: Bernard Vasquez
• 金额: $ 20.12万
• 依托单位: University of New Hampshire
• 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: 1999-08-15 至 2002-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9902904&HistoricalAwards=false
• 关键词: Three; Dimensional; Hybrid; Simulation; Analytic

The investigators will examine nonlinear and kinetic features of large amplitude Alfvenic fluctuations that are continuously observed in the solar wind. Recent observations from the SOHO spacecraft indicate that Alfvenic fluctuations may also be important in solar wind acceleration both through wave dissipation heating near the cyclotron resonance and direct forcing by the wave pressure gradient force. The main effort is to explore the connection between fluid (magnetohydrodynamic) and kinetic processes through hybrid simulations that allow full treatment of ion kinetics and wave turbulence. Two dimensional spectra and wave-particle interactions are included in the simulations.

研究人员将研究在太阳风中连续观测到的大振幅阿尔文波动的非线性和动力学特征。SOHO航天器最近的观测表明，Alfvenic波动也可能通过回旋共振附近的波耗散加热和波压梯度力的直接强迫在太阳风加速中发挥重要作用。主要的努力是探索流体（磁流体动力学）和动力学过程之间的连接，通过混合模拟，允许离子动力学和波湍流的充分治疗。模拟中包括了二维谱和波粒相互作用。