Simulation of Turbulent Flow over Complex Terrain

复杂地形湍流模拟

• 批准号: 0073395
• 负责人: Robert Street
• 金额: $ 34.53万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-05-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073395&HistoricalAwards=false
• 关键词: Simulation; Turbulent; Flow; over; Complex

The goal of this work is to improve the ability to simulate airflow over complex terrain using large-eddy simulation (LES). The approach is to apply to meteorology some of the recent advances that have been made in the modeling of engineering flows. Specifically, the objectives are (1) to develop and test several approximations for surface boundary conditions and models for characterizing the scales of motion that are unresolved by LES; and (2) to investigate the physics of atmospheric flows by applying the new models to data from several field studies. The approach employs highly parallel computing to achieve a grid resolution of about 10 m in the horizontal and 100 levels in the vertical. Examples of the kinds of complex situations to be investigated include inversion layers within a deep valley, steep orography, and valley winds.

这项工作的目的是提高大涡模拟（LES）在复杂地形上模拟气流的能力。该方法是将工程流程建模方面取得的一些最新进展应用于气象学。具体而言，目标是(1)开发和测试几种近似的表面边界条件和模型，用于表征LES无法解决的运动尺度；(2)将新模型应用于若干野外研究数据，研究大气流动的物理特性。该方法采用高度并行计算，在水平方向上实现约10米的网格分辨率，在垂直方向上实现约100层的网格分辨率。要研究的各种复杂情况的例子包括深山谷内的逆温层、陡峭的地形和山谷风。