Central kinematics at the end of the simulation for the three simulations models. Each row corresponds to a halo model, from top to bottom: Plummer, NFW1, and NFW2. The columns from left to right show the X, Y, and Z bulk velocity components, respectively. The first evident feature is that all the angular momentum exchange happens in the orbital plane (X − Y); therefore, the Z velocity component shows no pattern. Nearly cylindrical rotation is evident in the simulations’ final stage.