MHD process in the layer of gravitating sphere of growing radius

Yu. V. Khachay

Institute of Geophysics UB RAS, Russia

Abstract
A possibility of the occurrence of MHD dynamo at the stage of Earth's accumulation is studied based on a new mechanism suggested for the Earth's accumulation earlier. The evolution of the pressure-temperature distribution is described using previous results. A possibility of geomagnetic field generation by the appearance of a melted layer in the forming core is considered. The criterion chosen for field generation is the formation of some areas, in which magnetic induction exceeds the value of the external field. The problem of planetary accumulation and MHD generation was then solved numerically using the finite-difference method in the framework of a 3D model for a sector of a spherical layer in some natural variables. Figs 1, Refs 15.