Comparison between a DustPy simulation and a PLUTO simulation with our TriPoD dust coagulation model of a protoplanetary disk with radially varying fragmentation velocity (see Eq. (59)). The left and center columns depict the global dust distribution at two different snapshots of the simulations, with the DustPy simulation in the top row and the TriPoD simulation at the bottom. The right plot shows the local dust size distributions in the second snapshot at the locations of the vertical lines of the same color in the central panel. The gray lines in the right panel follow power laws with q = −3.5 and q = −3.0.