Comparison of the mass in planetesimals as a function of total metallicity obtained in different runs (points) and predicted by our analytical model (lines). The three different colors correspond to different values of the pressure gradient parameter Π. The three lines of the same colors correspond to different values of the fragmentation velocity used. For Π = 0.08 and v_f = 100 cm s^-1, there is no planetesimal formation predicted, thus the line is not visible.