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

这个项目试图了解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，在层结和旋转引起的广泛周期中的地球物理流动中观察到的湍流运动的基本动力学。流体流动中的运动尺度由流体运动在每个空间尺度上的能量量来识别，强烈地由运动后守恒的运动量决定。该项目使用计算密集的直接数值模拟(DNS)模型积分来阐明决定地球物理流的功率谱和尺度间能量转移的基本动力学。湍流流体中能量谱分布的第一原理理论自本课题开始以来一直是流体动力学中的一个重大挑战。在这一理论方面的进展可能会对大气和海洋模式的发展产生变革作用，特别是对这些模式中使用的闭合方案和湍流参数的发展。此外，通过对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，还计划在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、教育和培训合作计划(COMET，国家大气研究中心)，通过开发关于湍流的“学习对象”，以英语、法语和西班牙语发布在COMET网站上，开展外联活动。

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.