Analysis of velocity gradients for the full velocity (in purple dashdotted), the radial component (in blue dashed), and the orthoradial component (pink dotted). These quantities are represented at different scales in the simulation with 50% of perturbations and β = 1%, for the edge-on projection 1. Top: angular direction of velocity gradients. The origin of the angular direction corresponds to the direction of the disk scale gradient. Middle: amplitude of velocity gradients. Bottom: specific angular momentum as computed in observation analysis.