Control of the heat and mass transfer in magnetic fluids 1. Temperature distribution in a cylinder cooled in a magnetic fluid

V. V. Gogosov - V. V. Kiryushin - A. Ya. Simonovskii

Abstract
Effect of the magnetic field on heat and mass transfer in magnetic fluid has been studied both theoretically and experimentally. A steel cylinder has been cooled in the magnetic fluid in the presence of a magnetic field perpendicular to the cylinder axis. Measurements have shown that the cooling rate in different points of the cylinder surface depends considerably on the intensity and direction of the magnetic field. Temperature distribution in the cylinder mid cross-section at different time moments has been calculated using the temperature distribution on the cylinder surface found experimentally as a boundary condition. The temperature distribution and, consequently, the thermal stress field inside the cylinder have been found to be considerably nonuniform. It has been suggested that the cooling in a magnetic fluid could be applied to affect the thermal stress distribution and steel structure during the processes of hardening, quench-hardening and tempering in the magnetic field. Figs. 7, refs 3.