A Study of the Fluid Motion Occurring Near the Top of the Earth's Liquid Outer Core

地球液体外核顶部附近发生的流体运动的研究

• 批准号: 9104882
• 负责人: John Wahr
• 金额: $ 13.22万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9104882&HistoricalAwards=false
• 关键词: Study; Fluid; Motion; Occurring; Near

This project proposes to develop "second-generation" models of the fluid flow occurring near the top od the Earth's liquid outer core, using global geomagnetic data as the input observations. Customary assumptions, to be retained here, are that (i) the mantle is either an insulator, or a weak, radially symmetric conductor; (ii) the mantle is a spherical annulus; (iii) the core fluid is inviscid and incompressible. The new, ore realistic features to be included are the following: the core flow is unsteady, the core fluid is finitely conducting, and the input geomagnetic field model contains errors. The work will require a sequence of steps: completion of the basic theory, construction of an appropriate geomagnetic field model, implementation of the theory, and interpretation and inference from the resulting flow pattern.

本项目提出开发“第二代”车型 地球液体顶部附近的流体流动 外核，使用全球地磁数据作为输入 意见。 这里要保留的习惯假设是， (i)地幔要么是绝缘体，要么是弱的， 对称导体;（ii）地幔是球形环;（iii） 核心流体是无粘性的和不可压缩的。 新的，矿石 拟列入的现实特点如下：核心流 是不稳定的，核心流体是非线性传导的， 地磁场模型存在误差。 这项工作将需要一个 步骤顺序：完成基础理论， 适当的地磁场模型， 理论，以及由此产生的流的解释和推理 格局