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

该项目旨在了解在大气和海洋流动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，在很大程度上取决于运动后守恒的运动学量。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。紊流中能量谱分布的第一性原理理论自该主题开始以来一直是流体动力学中的一个重大挑战。这种理论的进展对于大气和海洋模式的发展，特别是对于这些模式中使用的闭合方案和湍流参数化的发展，可能具有变革性。此外，通过一名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，计划在2012年夏季举办一个关于地球物理湍流的研讨会。外展活动将通过业务气象、教育和培训合作项目（COMET，位于美国国家大气研究中心）开展，通过开发湍流的“学习对象”，以英语、法语和西班牙语发布在COMET网站上。

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.