Time evolution of angle δ for the inner (top panel) and outer disk (bottom panel). For the inner disk, δ was measured as the angle of the angular momentum vector at time t with respect to the initial angular momentum vector of the inner disk L₅₀(0). For the outer disk, δ is the angle between the angular momentum vector of gas located within a range from radius r = 200 AU to r = 225 AU and the initial angular momentum vector of the infalling cloudlet.