Convection and Dynamo in the Earth's Fluid Core

在现代大规模并行计算机上构造具有足够地球物理真实性的地球发电机数值模型具有重要的现实意义和科学价值。由NERC赠款支持（NER/O/S/2001/01262，运行时间：2003年10月1日至2007年12月26日），我们朝着开发新一代EBE迈出了重要一步（逐单元）有限元geodynamo代码，具有两个主要的显著优点：它特别适合于现代大规模并行计算机，实现几乎线性的可缩放性，并且它是高度灵活的，能够结合地球物理现实性，球面几何和局部变化。该申请要求为埃克塞特的一个PDRA提供资金，以继续/扩展我们现有的关于渐近对流研究和地球发电机建模的生产性研究，并促进我们对地球液核中非磁性非线性对流的时空结构以及对流-在导电流体核中运行的驱动地球发电机和从地球液核发出的磁通量的模式受到电不均匀性的影响。下地幔

Constructing numerical geodynamo models with sufficient geophysical realism on modern massively parallel computers is of both practical and scientific importance. Supported by a NERC grant (NER/O/S/2001/01262, running 01/10/2003 to 26/12/2007), we have taken a major step towards the development of a new generation, EBE (element-by-element) finite element geodynamo code that has two main significant advantages: it is particularly suitable for modern massively parallel computers achieving nearly linear scalability and it is highly flexible to be capable of incorporating geophysical realism such as non-spherical geometry and local variations. This application requests funding for one PDRA at Exeter to continue/extend our existing productive research on the asymptotic convection study and geodynamo modeling and to advance our understanding of the spatial and temporal structure of non-magnetic nonlinear convection in the Earth's liquid core and of how the convection-driven geodynamo operating in an electrically conducting fluid core and the pattern of magnetic flux emanating from the Earth's liquid core are affected by an electrically heterogeneous lower mantle.