Time evolution for a selection of quantities evaluated for sg-mhd-tau20-Lz6. First image: Dimensionless stresses as a function of time. Shown in blue is the Reynolds contribution, α_r, in red the gravitational contribution, α_g, and in black the Maxwell part, α_m. All stresses were calculated, using Eqs. (8) and (9). The values of α_r, and α_g were smoothed using a Gaussian function (see also Fig. 2). Second image: Horizontally averaged magnetic field component, ⟨B_y⟩_xy, as a function of height, z, and time, t. At tΩ₀ = 200 (vertical solid line), the magnetic seed field is introduced. The vertical dashed line corresponds to 320 after field seeding.