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，或者更准确地说是在分层和旋转引起的广泛周期性的地球物理流中。流体流中发现的运动尺度，通过每个空间尺度的流体运动中的能量量确定，由运动量的运动量强烈确定，这些运动量量是在运动后保守的。该项目使用直接数值模拟（DNS）模型的计算密集型集成，以阐明确定地球物理流量功率谱的基本动力学以及在尺度之间的能量传递。自该主题开始以来，湍流中能量光谱分布的第一原理理论一直是流体动力学的巨大挑战。朝着这种理论的发展可能是发展大气和海洋模型的发展，特别是对于这些模型中使用的封闭方案和湍流参数化的发展。此外，这项工作将通过研究生的教育以及两名博士后研究人员的指导，具有强大的教育成分。此外，计划在2012年夏季关于地球物理湍流的研讨会。外展活动将通过针对运营气象，教育和培训的合作计划（国家大气研究中心的彗星），通过在动荡流上开发“学习对象”，以英语，法语和西班牙语的方式发布在彗星网站上。