Fundamental Aspects of Plasma Turbulence with Applications to Large-Eddy Simulations and Solar Wind Modeling

等离子体湍流的基本方面及其在大涡模拟和太阳风建模中的应用

• 批准号: 9814045
• 负责人: Ye Zhou
• 金额: $ 24.28万
• 依托单位: Universities Space Research Association
• 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 2000-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814045&HistoricalAwards=false
• 关键词: Fundamental; Aspects; Plasma; Turbulence; Applications

The investigators will develop a methodology using spectral transfer functions in order to achieve a breakthrough understanding of magnetohydrodynamic (MHD) turbulence and its applications. Transfer functions measure the strength, wave-number locality, and anisotropy of nonlinear couplings. Previously this formalism has been applied to hydrodynamic turbulence, but to date has not been applied to magnetohydrodynamic turbulence. The main effort is to use high-resolution numerical simulations to construct transfer function expressions that directly measure the strength and anisotropy of local and non-local wave couplings. Results will be compared with spacecraft observations to clarify several outstanding questions about solar wind turbulence.

研究人员将开发一种使用光谱传递函数的方法，以实现对磁流体动力学(MHD)湍流及其应用的突破性理解。传递函数测量非线性耦合的强度、波数局部性和各向异性。以前这种形式已经应用于流体力学湍流，但迄今为止还没有应用于磁流体湍流。主要工作是使用高分辨率的数值模拟来构造直接测量局域和非局域波耦合的强度和各向异性的传递函数表达式。结果将与航天器的观测结果进行比较，以澄清关于太阳风湍流的几个悬而未决的问题。