Numerical Modeling of Tornadogenesis

龙卷发生的数值模拟

• 批准号: 9002391
• 负责人: Brian Fiedler
• 金额: $ 11.74万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9002391&HistoricalAwards=false
• 关键词: Numerical; Modeling; Tornadogenesis

The destructive power of tornadoes is well known, but the exact dynamical processes that cause the formation and maintenance of tornadoes is not yet completely understood. The Principal Investigator will use a numerical model to study the dynamics of the air flow in and around a tornado vortex with a concentration on the region that would be below cloud base in an actual thunderstorm. The Principal Investigator will utilize, for the first time in a study of this type, advanced numerical techniques that allow the model to adjust its resolution as the model runs. This provides fine resolution only in the areas where it is most needed. Additionally, most previous studies of vortices, whether laboratory, numerical or theoretical, have assumed symmetry of the environmental flow. The Principal Investigator will be able to relax this assumption which will provide the ability to study these vortices under a variety of environmental conditions.

龙卷风的破坏力是众所周知的，但确切的 形成和维持的动力过程 人们对龙卷风还没有完全了解。 主要研究者将使用数值模型研究 在龙卷风涡旋内和周围的空气流动动力学， 浓度的区域，将低于云基地，在一个 真正的雷暴 主要研究者将使用， 第一次在这种类型的研究，先进的数值技术， 允许模型在运行时调整其分辨率。 这 仅在最需要的区域提供精细分辨率。 此外，大多数以前的研究漩涡，无论是实验室， 数值的或理论的，都假设环境对称 流 主要研究者将能够放松这一点， 这一假设将提供研究这些涡流的能力 在各种环境条件下。