Time evolution of the volume-averaged magnetic field component (⟨B_y⟩; first image) and the magnetic stress to pressure ratio (r_sp = ⟨ − 2B_xB_y⟩/⟨|B|²⟩, second image). The time axis starts at tΩ₀ = 600 and extends towards tΩ₀ = 1600. Simulation sg-eta01 was run until 2400, but for comparison it is only plotted for tΩ₀ ≤ 1600. The case sg-eta0006 was only run to 1400. The tΩ₀ ≤ 1000 interval corresponds to the ideal-MHD case sg-mhd-2 (see Löhnert & Peeters 2022, or Table 1). All resistive simulations were restarted from sg-mhd-2 at 1000. The horizontal dashed line in the second image indicates r_sp = 0.3.