The strong-field regime of the geodynamo

地球发电机的强场状态

• 批准号: 2182079
• 金额: --
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2182079
• 关键词: strong; field; regime; geodynamo

The main aim for this PhD project is to develop a better understanding of the dynamo process in planetary cores, and study the influence of key parameters such as the planet rotation rate and the convective driving. In particular we will study the strong-field regime through the use of an imposed magnetic field. After achieving this, we can remove the imposed field and see whether the dynamo process is able to operate without it, thus creating a model which produces a magnetic field in the same way as many planets. To summarize, our goals for this project are:1. Determine the conditions in which a magnetic field yields strong enough magnetic forces to affect the dynamics of a magnetoconvective flow.2. Produce a strong-field regime in a self-excited dynamo process after producing the same regime through magnetoconvection.3. Extrapolate these results to planetary core conditions

本博士项目的主要目的是更好地了解行星核心的发电机过程，并研究行星自转速率和对流驱动等关键参数的影响。特别地，我们将通过使用施加的磁场来研究强场状态。在实现这一点之后，我们可以移除强加的磁场，看看发电机过程是否能够在没有它的情况下运行，从而创建一个模型，以与许多行星相同的方式产生磁场。总的来说，我们这个项目的目标是：1。确定磁场产生足够强的磁力以影响磁对流流动动力学的条件。在自激发电机过程中，先通过磁对流产生强磁场，再产生强磁场。将这些结果外推到行星的核心条件

项目成果

Magnetoconvection in a rotating spherical shell in the presence of a uniform axial magnetic field

存在均匀轴向磁场的旋转球壳中的磁对流

• 期刊: Geophysical and Astrophysical Fluid Dynamics
• 影响因子: 1.3
• 作者: Mason SJ