Numerical Modeling of Tornadogenesis

龙卷风的破坏力是众所周知的，但导致龙卷风形成和维持的确切动力学过程尚未完全了解。首席调查员将使用一个数值模式来研究龙卷风涡旋内部和周围的空气流动动力学，集中在实际雷暴中低于云底的区域。首席调查员将首次在这类研究中利用先进的数值技术，使模型能够随着模型的运行而调整其分辨率。这仅在最需要的区域提供了精细的分辨率。此外，以前对旋涡的大多数研究，无论是实验室的、数值的还是理论的，都假定了环境流动的对称性。首席调查员将能够放宽这一假设，这将提供在各种环境条件下研究这些涡旋的能力。

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.