Influence of a vertical uniform external magnetic field on thermomagnetic convection in a square cavity.

M. S. Krakov¹ - I. V. Nikiforov²

¹ Belarussian State Polytechnic Academy, Minsk, 220027, Belarus
² Belarussian State University, Minsk, 220050, Belarus

Abstract
The natural convection in magnetic fluids under a gradient magnetic field is now studied in more detail. Main attention is paid to the influence of a uniform magnetic field. It is shown that in a square cavity the competition between gravity convection and thermomagnetic convection can lead to a complicated dependence of a heat flux through the cavity on the magnetic field: the magnetic field can both enhance and depress heat transfer. The numerical simulation has shown that the convective flow in the square cavity can have either one-cell or two-cell structures, and the competition between these structures defines the resulting heat flux. Figs 7, Refs 7.