Magnetoconvection in a plane layer rotating about the horizontal axis: The effect of anisotropic diffusivities

Contributions to Geophysics and Geodesy

Tomáš Šoltis¹ 

关键词: anisotropic diffusion coefficients;    rotating magnetoconvection;    horizontal rotation axis;    Earth’s core;    geomagnetic field;   

DOI  :  10.2478/congeo-2013-0017

学科分类：地球科学(综合)

来源: De Gruyter

【 摘 要 】

A linear stability analysis of convection arising in a horizontal plane layer rotating about the horizontal axis and permeated by a homogeneous horizontal magnetic field perpendicular to the rotation axis is performed. Resulting horizontal convective rolls are inclined to the magnetic field at an angle dependent on the dimensionless numbers − the Elsasser, Ekman and Roberts numbers, and moreover on the anisotropy parameter, the ratio of horizontal and vertical diffusion coefficients (which are the viscosity and thermal diffusivity; magnetic diffusivity is considered isotropic).

【 授权许可】

CC BY-NC-ND