Grain-size distributions at 10 kyr compared to the initial MRN distribution (black) for the carbonaceous and silicate grains. The y-axis represents the dust mass density per particle radius, which is the number of dust grains per volume and grain radius dn/da multiplied with the particle mass m. All z = 0 simulation parameter sets are shown, including the different considered turbulent Mach numbers (ℳ) and average ISM densities (n). The plots differentiate between carbonaceous (blue) and silicate (orange) dust, and the grain–grain collisions and sputtering (solid), and the sputtering-only (dotted) simulations.