Numerical Simulation of Convective Phenomena

对流现象的数值模拟

• 批准号: 9214098
• 负责人: Robert Wilhelmson
• 金额: $ 42万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9214098&HistoricalAwards=false
• 关键词: Numerical; Simulation; Convective; Phenomena

The Principal Investigator will use existing observational data and a state of the art mesoscale numerical model to investigate a wide range of convective phenomena such as squall lines, severe storms, convective turbulence, tornadoes and gust fronts. The objective is to advance fundamental understanding of the dynamics and physics associated with these events with the ultimate goal of providing guidance which will assist in more accurate prediction of severe weather events. Specific objectives include: (1) determining the dynamics and accompanying environment of long-lived tornadoes; (2) investigating the convective behavior of an observed squall line through the use of a hydrostatic regional model coupled to a nonhydrostatic convection model; (3) understanding the role of boundary-layer convergence/shear boundaries in the generation of non-supercell tornadoes; (4) probing the behavior of individual convection within mid-latitude squall lines simulated in environments with horizontal variability; (5) exploring the dynamics of turbulence under dry, moist, and precipitating conditions through simulation of the multiple scales involved; and (6) further development of the modeling, analysis, and visualization for studying convection.

主要研究者将使用现有的观察 数据和最先进的中尺度数值模式， 研究范围广泛对流现象，例如： 线、强风暴、对流湍流、龙卷风和阵风 战线 目标是促进对以下问题的基本理解： 与这些事件相关的动力学和物理学 最终目标是提供指导， 准确预测恶劣天气事件。 具体目标 包括：（1）确定动力学和伴随环境 长寿命龙卷风;（2）调查对流行为 利用流体静力学观测到的飑线 区域模式与非静力对流模式耦合;（3） 了解边界层会聚/切变的作用 非超级单体龙卷风生成的边界;（4） 探测中纬度地区单个对流的行为 在水平变化环境中模拟的飑线; (5)探索在干燥、潮湿和 多尺度模拟降水条件 参与;和（6）进一步发展的建模，分析， 以及用于研究对流的可视化。