Induced magnetic moments from a nearly spherical ocean.

ABSTRACT: The five largest planets all have strong intrinsic magnetic fields that interact with their satellites, many of which contain electrically conducting materials on global scales. Conducting bodies exposed to time-varying magnetic fields induce secondary magnetic fields from movement of eddy currents. In the case of spherically symmetric conducting bodies, matching magnetic solutions at the boundary results in relatively simple relations between the excitation field and the induced field. In this work, we determine the more complicated induced magnetic field from a near-spherical conductor, where the outer boundary is expanded in spherical harmonics. Under the approximations that the excitation field is uniform at a single frequency, the product of wavenumber and radius for the body is large

SUBMITTER: Styczinski MJ 

PROVIDER: S-EPMC8819694 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature