Liquid Sodium Geodynamo Models

液钠地球发电机模型

• 批准号: 0809849
• 负责人: Daniel Lathrop
• 金额: $ 39.5万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0809849&HistoricalAwards=false
• 关键词: Liquid; Sodium; Geodynamo; Models

This research seeks to understand the Earth's magnetic field by using unique rotating liquid sodium experiments as models of the Earth's core. The Earth's magnetic field acts as a shield to radiation from the sun. It is dynamic and has been in decline for the past several hundred years. Since we do not understand how a turbulent flow in the core can generate magnetic fields, we presently cannot predict the future of the Earth's field. Experiments give a unique window by being laboratory models of the Earth's core.These experiments match as many of the conditions as possible in the laboratory, including the importance of rotation, liquid metal induction, and significant magnetic forces. The experiments explore the flow dynamics and conditions by probing the motion and induced magnetic fields of the experiments. Broader impacts for this research include the key role that young researchers play in the ongoing projects. The mentoring of student researchers is a very important part of this project. As well, we have played, and hope to continue to play, an active role in science documentaries addressing changes in the geomagnetic field. The scientific results of this research have implications in geophysics, astrophysics, plasma physics, nonlinear dynamics, and fluid dynamics -- the research is inherently cross-disciplinary.

这项研究试图通过使用独特的旋转液体钠实验作为地球核心的模型来了解地球的磁场。地球的磁场起着屏蔽太阳辐射的作用。它是动态的，在过去的几百年里一直在下降。 由于我们不了解地核中的湍流是如何产生磁场的，因此我们目前无法预测地球磁场的未来。这些实验提供了一个独特的窗口，作为地球核心的实验室模型。这些实验尽可能多地匹配实验室中的条件，包括旋转的重要性，液态金属感应和显著的磁力。实验通过探测实验的运动和感应磁场来探索流动动力学和条件。 这项研究的更广泛影响包括年轻研究人员在正在进行的项目中发挥的关键作用。对学生研究人员的指导是这个项目非常重要的一部分。同时，我们也在探讨地磁场变化的科学纪录片中发挥了积极作用，并希望继续发挥作用。 这项研究的科学成果在天体物理学、天体物理学、等离子体物理学、非线性动力学和流体动力学中都有意义--这项研究本质上是跨学科的。