Simulation of Turbulent Flow Over Complex Terrain

复杂地形湍流模拟

• 批准号: 9526246
• 负责人: Robert Street
• 金额: $ 25.75万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526246&HistoricalAwards=false
• 关键词: Simulation; Turbulent; Flow; Over; Complex

Abstract/Street ATM-9526246 A well defined set of numerical experiments is proposed for an investigation of turbulent flow over complex terrain. The objective is the simulation and analysis of flow features crucial in the physics of dispersion and mixing over topography and for the improvement of mesoscale atmospheric simulation, (e.g., lee waves, wave breaking, flow separation, and orographic drag). An important first step towards improved understanding of these features in the atmosphere is their accurate simulation at model (laboratory) scales. The proposed extension of a set of simulation tools developed under a previous NSF grant contains the elements necessary for accurate simulation of model-scale atmospheric flows. The research strategy is to: develop the numerical tools, validate and test the toolds, and investigate turbulent flow over several arrangements of terrain. Simulation of laboratory-sized geophysical flows over complex terrain would contribute to field-scale atmospheric simulations in two ways: through the improvement of approximate boundary conditions and parameterizations for mesoscale simulations, and through direct insight into the flow physics.

摘要/街道ATM-9526246 本文提出了一套适用于复杂地形湍流流动研究的数值试验方法。 目标是模拟和分析在地形上的扩散和混合物理学中至关重要的流动特征，并改进中尺度大气模拟（例如，背风波、波浪破碎、气流分离和地形阻力）。 要更好地了解大气中的这些特征，重要的第一步是在模型（实验室）尺度上对其进行精确模拟。 根据以前的NSF拨款开发的一套模拟工具的拟议扩展包含了精确模拟模型尺度大气流所必需的元素。 研究战略是： 开发数值工具，验证和测试工具，并研究几种地形上的湍流。 模拟复杂地形上的实验室规模的地球物理流将有助于现场规模的大气模拟在两个方面：通过改进近似边界条件和参数化的中尺度模拟，并通过直接洞察流物理。