Modeling of magnetic field polarity reversal processes of planets and stars

A. Mikelsons

Institute of Physics, University of Latvia, Salaspils-1, LV-2169, Latvia

Abstract
A possibility to implement the conditions of magnetic field freezing by deforming materials with permanent magnetism has been shown experimentally. A condition supporting the magnetic field by the MHD-dynamo mechanism is the motion when one neighbouring force line of the field slides along another. Several hypotheses explain the polarity reversal of magnetic field by the instability of a turbulent M-profile of differential rotation velocities in the liquid-metal core of planets and emphasize two types of convective flow: a turbulent one in the liquid-metal core and a laminar one in the outside semi-liquid zone, i.e., astenosphere, as the sources of a summed up magnetic field of the Earth. Figs 6, Refs 6.