The problem of the geodynamo is simple to formulate (Why does the Earth possess a magnetic field?), yet it proves surprisingly hard to address. As with most geophysical flows, the fluid flow of molten iron in the Earth's core is strongly influenced by the Coriolis effect. Because the liquid is electrically conducting, it is also strongly influenced by the Lorentz force. The balance is unusual in that, whereas each of these effects considered separately tends to impede the flow, the magnetic field in the Earth's core relaxes the effect of the rapid rotation and allows the development of a large-scale flow in the core that in turn regenerates the field. This review covers some recent developments regarding the interplay between rotation and magnetic fields and how it affects the flow in the Earth's core.

中文翻译：

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快速旋转的磁流体动力学和 Geodynamo


地发电机的问题表述很简单（为什么地球有磁场？），但事实证明它却出奇地难以解决。与大多数地球物理流动一样，地核中铁水的流体流动受到科里奥利效应的强烈影响。因为液体是导电的，所以它也受到洛伦兹力的强烈影响。这种平衡是不寻常的，因为虽然单独考虑这些影响中的每一种都会阻碍流动，但地核中的磁场放松了快速旋转的影响，并允许在地核中发展出大规模的流动，进而使磁场再生。这篇综述涵盖了有关旋转和磁场之间相互作用以及它如何影响地核流动的一些最新进展。