Strong-field dynamo action in rapidly rotating convection with no inertia.
Strong-field dynamo action in rapidly rotating convection with no inertia.
复制标题
无惯性快速旋转对流中的强场发电机作用。
DOI：
10.1103/physreve.93.061101
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Hughes DW
中科院分区：
文献类型：
--
作者：
Hughes DW
The earth's magnetic field is generated by dynamo action driven by convection in the outer core. For numerical reasons, inertial and viscous forces play an important role in geodynamo models; however, the primary dynamical balance in the earth's core is believed to be between buoyancy, Coriolis, and magnetic forces. The hope has been that by setting the Ekman number to be as small as computationally feasible, an asymptotic regime would be reached in which the correct force balance is achieved. However, recent analyses of geodynamo models suggest that the desired balance has still not yet been attained. Here we adopt a complementary approach consisting of a model of rapidly rotating convection in which inertial forces are neglected from the outset. Within this framework we are able to construct a branch of solutions in which the dynamo generates a strong magnetic field that satisfies the expected force balance. The resulting strongly magnetized convection is dramatically different from the corresponding solutions in which the field is weak.
影响因子：
4
作者：
Glatzmaier, GA;Roberts, PH
通讯作者：
Roberts, PH
影响因子：
64.8
作者：
A. Kageyama;T. Miyagoshi;Tetsuya Sato
通讯作者：
A. Kageyama;T. Miyagoshi;Tetsuya Sato