Numerical simulation of dynamos on massively parallel computers in cartesian domains

笛卡尔域大规模并行计算机上发电机的数值模拟

• 批准号: 5249644
• 负责人: Professor Dr. Ulrich Hansen
• 金额: --
• 依托单位: Institut für Geophysik
• 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 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5249644?language=en
• 关键词: Numerical; simulation; dynamos; massively; parallel

The aim to develop an understanding of the mechanism which generates and maintains the Earth's magnetic field certainly ranges among the most challenging and fascinating problems in Geophysics. It is commonly believed that the magnetic field is maintained by a dynamo working in the Earth's Outer Core. In a complicated process convection currents in the electrically conducting material of the Outer Core transform kinetic into magnetic energy. While principally understood, the internal way of working of planetary dynamos is only roughly known. Laboratory experiments can not reach the relevant parameters and the scales of the problem. Due to it's nonlinear nature the dynamo problem defies a rigorous analytical approach. Numerical modelling allows today the investigation of dynamically selfconsistent dynamos but is certainly still in an intial phase. In the course of the here proposed research we want to apply and further develop a numerical model in order to better understand the dynamo process and to identify mechanisms which play a keyrole for the spatial-temporal evolution of the magnetic field. Our model approach is designed to run efficiently on parallel computers. This will enable us to study a wide range of parameters.

目的是发展的机制，产生和维持地球的磁场的理解当然范围内最具挑战性和迷人的问题，在地球物理学。人们普遍认为，磁场是由地球外核中的发电机维持的。在一个复杂的过程中，外核导电材料中的对流将动能转化为磁能。虽然基本上了解，但行星发电机的内部工作方式只是粗略地知道。实验室实验无法达到相关的参数和规模的问题。由于它的非线性性质，发电机问题无法用严格的分析方法来解决。数值模拟允许今天的调查动态自洽发电机，但肯定仍处于初始阶段。在这里提出的研究过程中，我们希望应用和进一步发展的数值模型，以更好地了解发电机过程，并确定机制发挥了关键作用的磁场的时空演变。我们的模型方法被设计为在并行计算机上有效地运行。这将使我们能够研究广泛的参数。