Numerical Simulations of Models for the Geodynamo

地球发电机模型的数值模拟

• 批准号: 5250472
• 负责人: Professor Dr. Friedrich H. Busse
• 金额: --
• 依托单位: Physikalisches Institut
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2000
• 资助国家: 德国
• 起止时间: 1999-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5250472?language=en
• 关键词: Numerical; Simulations; Models; Geodynamo

The understanding of convection driven dynamos in rotating spherical shells has progressed rapidly in the past decade through the use of large scale numerical simulations such that more specific models can now be considered for the elucidations of properties of the geodynamo operating in the liquid core of the Earth. It is planned to investigate the influence of lateral inhomogeneities at the core-mantle boundary on the generation of magnetic fields and to analyse the processes of execusions and reversals in a systematic manner. In the numerical simulations the use of hyperdiffusivities will be avoided since they appear to introduce unrealistic properties of the dynamo process.

在过去的十年中，通过大规模数值模拟的使用，对旋转球壳中对流驱动的发电机的理解取得了迅速的进展，现在可以考虑使用更具体的模型来阐明在地球液体核中运行的地球发电机的特性。计划研究地核-地幔边界的横向不均匀性对磁场产生的影响，并系统地分析抛射和反转过程。在数值模拟中，将避免使用超扩散系数，因为它们似乎引入了发电机过程的不切实际的特性。