Studies of Buoyant Magnetostrophic Flow

浮力磁致流动的研究

• 批准号: 9417481
• 负责人: David Loper
• 金额: $ 14.5万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1999-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417481&HistoricalAwards=false
• 关键词: Studies; Buoyant; Magnetostrophic; Flow

Loper 9417481 The proposed research consists of two related projects dealing with small-scale buoyant magnetostrophic flow in the Earth's core. The first project has two complementary motivations: to understand better the relation between the observed secular variation and the dynamical state of the uppermost portion of the outer core and to investigate whether the presence of a rigid boundary can break the symmetry of the buoyancy-driven flow and generate helicity and an alpha effect. The flow and field driven by a prescribed buoyancy distribution will be found by solving the linearized momentum and magnetic-diffusion equations in an oblique Caresian coordinate system using a double Fourier transform. The second project will seek to determine the equilibrium shape and size of small-scale deformable buoyant parcels in the core, as well as their rise velocity. The linearized momentum and magnetic-diffusion equation. ****

Loper 9417481拟议的研究包括两个相关的项目，涉及地球核心的小规模浮力磁转流。 第一个项目有两个互补的动机：更好地了解观测到的长期变化和外核最上部的动力学状态之间的关系，并调查刚性边界的存在是否可以打破浮力驱动流的对称性，并产生螺旋度和α效应。 由规定的浮力分布驱动的流和场将通过使用双傅立叶变换在斜卡里斯坐标系中求解线性化的动量和磁扩散方程来找到。 第二个项目将设法确定核心中小规模可变形浮力块的平衡形状和大小，以及它们的上升速度。 线性化动量方程和磁扩散方程。 ****