Nonlinear Magnetohydrodynamic Wave Coupling and Dissipation in the Solar Corona

日冕中的非线性磁流体动力波耦合和耗散

• 批准号: 9986058
• 负责人: Yung Mok
• 金额: $ 14万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986058&HistoricalAwards=false
• 关键词: Nonlinear; Magnetohydrodynamic; Wave; Coupling; Dissipation

Abstract: ATM 99-86058Proposal Title: Nonlinear Magnetohydrodynamic Wave Coupling and Dissipation in the Solar CoronaPrincipal Investigator: Yung Mok, University of California, Irvine The investigator will examine the possibility that the solar corona is heated by magnetohydrodynamic (MHD) waves excited at the photosphere. The main effort is to concentrate on numerical investigation of inhomogeneous background effects on wave propagation and dissipation, using a sequence of idealized models that are nonetheless significant advances over previous work. Idealizations to be studied include a model of transverse gradients, a model of longitudinal gradients, and a model of curvature effects. . Critical processes involve the development of thin layers where the variables have high gradients, and nonlinear processes that exchange energy among modes and among the fundamental and harmonics. The project consists of basic numerical experimentation with a goal of elucidating properties and evaluating existing models of the corona and the energy and heating budgets associated with its fluctuations.

摘要：ATM 99-86058 提案标题：日冕中的非线性磁流体动力波耦合和耗散首席研究员：Yung Mok，加州大学欧文分校研究员将研究日冕被光球层激发的磁流体动力 (MHD) 波加热的可能性。主要工作是集中于对波传播和耗散的不均匀背景效应的数值研究，使用一系列理想化模型，这些模型仍然比以前的工作取得了重大进展。要研究的理想化包括横向梯度模型、纵向梯度模型和曲率效应模型。 。关键过程涉及变量具有高梯度的薄层的发展，以及在模态之间以及基波和谐波之间交换能量的非线性过程。该项目包括基本数值实验，目的是阐明日冕的特性并评估现有的日冕模型以及与其波动相关的能量和热量预算。