Fig. 13a shows the density distribution of the translational particle velocity magnitude for the experiment and the simulation. Only the range of the simulation time at stable regime was taken into account in the simulation. For the experiment a modal value of the particle velocity was found at up=0.55 m/s. Obviously the distributions are in a good agreement and the determined modal value of the simulation is up=0.51 m/s, which is about 8% lower than measured.