CSEDI Collaborative Research: Next Generation Modeling of Core Turbulence via Combined Laboratory, Numerical and Theoretical Models

CSEDI 协作研究：通过实验室、数值和理论组合模型对核心湍流进行下一代建模

• 批准号: 1067944
• 负责人: Keith Julien
• 金额: $ 30万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1067944&HistoricalAwards=false
• 关键词: CSEDI; Collaborative; Research; Next; Generation

The geomagnetic field is generated by a so-called `fluid dynamo'. This dynamo is driven by rapidly rotating, turbulent convection in Earth's molten metal core. Yet rapidly rotating core-style convective turbulence has not been accurately simulated. The goal of this project is to provide the first cross-disciplinary quantification of rapidly rotating, turbulent, core-style convection. In doing so, we will greatly strengthen our understanding of the core flows that turn Earth into a giant magnet.We will develop next-generation models of turbulent convection in Earth's core to address significant limitations in current models of dynamo generation. These models will combine leading laboratory rotating convection experiments with state-of-the-art finite element models and with advanced, asymptotically reduced theoretical models of rotating convection systems. The data we will produce will be of fundamental importance to modelers of Earth's core and other planetary dynamos, as well as modelers of solar and stellar convection zones and dynamos, and modelers of Earth's climate and planetary atmospheres. The asymptotically reduced modeling tools will be made openly available through the Computational Infrastructure for Geosciences (CIG) website. Furthermore, we will develop a unique library of geoscience educational films, via an ongoing internship for students interested in combining science and documentary filmmaking.

地磁场是由所谓的“流体发电机”产生的。这个发电机是由地球熔融金属核心中快速旋转的湍流对流驱动的。然而，快速旋转的核心式对流湍流还没有被准确地模拟。 该项目的目标是提供第一个跨学科的快速旋转，湍流，核心式对流的量化。 通过这样做，我们将大大加强我们对将地球变成一个巨大磁铁的核心流的理解，我们将开发下一代地球核心湍流对流模型，以解决当前发电机发电模型的重大局限性。 这些模型将结合联合收割机领先的实验室旋转对流实验与国家的最先进的有限元模型和先进的，渐近减少旋转对流系统的理论模型。 我们将产生的数据将对地球核心和其他行星发电机的建模者，以及太阳和恒星对流区和发电机的建模者，以及地球气候和行星大气的建模者具有根本的重要性。渐近简化建模工具将通过地球科学计算基础设施（CIG）网站公开提供。此外，我们将开发一个独特的地球科学教育电影库，通过对科学和纪录片制作相结合感兴趣的学生正在进行的实习。