Collaborative Research: CMG--Analysis and Modeling of Rotating Stratified Flows

合作研究：CMG--旋转层流分析与建模

• 批准号: 1025166
• 负责人: Susan Kurien
• 金额: $ 17.7万
• 依托单位: New Mexico Consortium
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1025166&HistoricalAwards=false
• 关键词: Collaborative; Research; CMG; Analysis; Modeling

This project seeks to understand the fundamental dynamics of the turbulent motions commonly observed in atmospheric and oceanic flow, or more precisely in geophysical flows over a broad range of periodicities induced by stratification and rotation. The scales of motion found in fluid flow, identified by the amount of energy in fluid motions in each spatial scale, are strongly determined by the kinematic quantities which are conserved following the motion. This project uses computationally intensive integrations of Direct Numerical Simulation (DNS) models to elucidate the fundamental dynamics which determine the power spectrum of geophysical flows and the transfer of energy between scales. A first-principles theory of the spectral distribution of energy in turbulent fluids has been a grand challenge in fluid dynamics since the inception of the topic. Progress towards such a theory could be transformative for the development of atmospheric and oceanic models, particularly for the development of closure schemes and turbulence parameterizations used in these models. In addition, the work will have a strong educational component, through the education of a graduate student and the mentoring of two postdoctoral researchers. In addition, a workshop is planned for the summer of 2012 on geophysical turbulence. Outreach will be conducted through the Cooperative program for Operational Meteorology, Education, and Training (COMET, at the National Center for Atmospheric Research), through the development of "learning objects" on turbulent flows, to be posted on the COMET website in English, French, and Spanish.

该项目旨在了解大气和海洋流中常见的湍流运动的基本动力学，或者更准确地说，在由分层和旋转引起的广泛周期性的地球物理流中观察到的湍流运动的基本动力学。流体流动中发现的运动尺度，由每个空间尺度中流体运动的能量来确定，很大程度上是由运动后守恒的运动量决定的。该项目使用直接数值模拟（DNS）模型的计算密集型集成来阐明决定地球物理流功率谱和尺度之间能量转移的基本动力学。自该主题诞生以来，湍流流体中能量谱分布的第一原理理论一直是流体动力学领域的一个巨大挑战。这种理论的进展可能会对大气和海洋模型的发展产生变革，特别是对这些模型中使用的闭合方案和湍流参数化的发展。此外，通过对研究生的教育和两名博士后研究人员的指导，这项工作将具有很强的教育成分。此外，计划于 2012 年夏季举办一次关于地球物理湍流的研讨会。外展活动将通过业务气象、教育和培训合作计划（COMET，位于国家大气研究中心）进行，通过开发关于湍流的“学习对象”，并将其发布在 COMET 英文网站上，法语、西班牙语。