Temporal evolution of the kinetic energy (on a long timescale, left and zoomed in, mid-panel) and magnetic energy ratio (right) for five different cases: three cases with (blue: R2, green: R5, red: R6 and black: R9) and two cases with (cyan: R7 and magenta: R8). For the magnetic energy plot, the cyan and magenta curves are almost superimposed, as well as the red and green curves. The long term evolution is similar for the cases with the same , as long as Pr is small enough, but different for different values of . In particular, the amount of toroidal field produced is much less in the case where .