In this verification case, a spherical particle acting under gravity and with the following criteria begins to roll on a flat surface:
Diameter
Initial translational velocity in the x-direction
Initial rotational velocity in the z-direction
Due to the rolling friction, the translational velocity is converted into rotational velocity. After a short deceleration phase, the no-slip condition occurs at the ball-surface contact point and the ball reaches constant translational and rotational velocities. An illustration of this case at initial time condition is shown in Figure 2.1: Ball rolling on a flat surface..
