Temporal evolution of the gas density (in logarithmic scale in units of ρ₀) for the model DO₁₃. Left panel : Time t = 3T₀. Right panel: Time t = 6T₀. The streamlines of the angular momentum fluxes (f_B) carried by the magnetic field are represented by the blue lines in the left side of each panel. On the right sides the velocity vectors are shown with yellow arrows. The inserts show a zoomed-in view of a region of the density maps where R < R_co.