Unstratified axisymmetric solutions of the runs in Fig. 2 at the times when the poloidal kinetic energy reaches its maximum. The Reynolds number Re and the Hartmann number Ha₀ are shown at the top of each panel. The magnetic Prandtl number Pm is 1. The colour contours show the azimuthal magnetic field Le_ϕ and the black isocontour lines the meridional circulation (solid and dashed for clockwise and counterclockwise, respectively).