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.

该项目旨在了解在大气和海洋流动中通常观察到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动中。在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确定，强烈地由运动之后守恒的运动学量确定。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确定地球物理流的功率谱和尺度之间的能量转移的基本动力学。湍流流体中能量谱分布的第一性原理理论自提出以来一直是流体动力学中的一个重大挑战。在这一理论方面取得的进展可能会对大气和海洋模式的发展产生变革性影响，特别是对这些模式中使用的闭合方案和湍流参数化的发展。此外，这项工作将有一个强大的教育组成部分，通过一个研究生的教育和两个博士后研究人员的辅导。此外，计划在2012年夏季举办一次关于地球物理湍流的讲习班。将通过业务气象学、教育和培训合作方案（COMET，在国家大气研究中心），通过开发关于湍流的“学习对象”，以英文、法文和西班牙文张贴在COMET网站上，开展推广活动。