Spatial and radial distribution of the maximum dust size a_max and the Stokes number at t = 18 kyr. The top row consists of two sub-panels: the left-hand side subpanel showing a_max and right-hand side one presenting the ratio of the fragmentation barrier a_frag to the actual maximum size of dust grains a_max, both in the disk midplane. The second row is the vertical cut taken across the disk at y = 0, third and bottom rows are a_max and St, respectively, as a function of radial distance in the disk midplane in all directions. The scale bars for a_max are in log cm, while the color bar for a_frag/a_max is in log dimensionless units.