Stability of Circular Vortices

圆形涡旋的稳定性

• 批准号: 9121998
• 负责人: George Carnevale
• 金额: $ 14.9万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 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: 1992-06-01 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9121998&HistoricalAwards=false
• 关键词: Stability; Circular; Vortices

An idealized study of barotropic eddies in the ocean will be conducted by means of numerical simulations and semi-analytic calculations. This is an important step to understanding the dynamics of isolated baroclinic vortices in a realistic ocean. Numerical simulations and laboratory experiments have shown that, although the intermediate behavior of the eddies can be very complicated, the final result of instability is either a stable rotating tripole or a pair of stable translating dipoles. An analytic study of the stability of the initial vorticity profiles to finite amplitude perturbations will also be done using a moment approach based on Lagrangian perturbations.

对海洋中正压涡旋的理想化研究将是 通过数值模拟和半解析方法进行 计算。这是理解 在现实海洋中孤立斜压涡旋的动力学。 数值模拟和实验室实验表明， 尽管涡流的中间行为可能非常 复杂的，不稳定的最终结果要么是稳定的， 旋转三极或一对稳定的平移偶极子。一个 初始涡度廓线稳定性的解析研究 有限振幅扰动也将使用矩 基于拉格朗日摄动的方法。