Abstract
A numerical study of natural convection in a differentially heated cubic cavity for Pr = 0.054 and in the presence of an external magnetic field orthogonal to the isothermal walls is carried out. The effect of this field on the three-dimensional spiraling transverse flow is analyzed. In addition to the damping and laminarization effects of the external magnetic field, an organization of the central three-dimensional motion is observed. Also, a depiction of the merging phenomena of the two central vortices is shown.