Radial drift velocity of runs SI30-4-2-c, SI41-4-2-c, SI30-3-2-c, and SI41-3-2-c in terms of Stokes number (τ_s) at t ≈ 1000 Ω⁻¹. Individual black points show the radial drift velocities of a random subset of approximately 14 000 particles. The particle size distribution is continuous, such that each particle has a unique size and drift velocity. Each red cross shows the mean drift velocity of two hundred particles with similar τ_s, which decreases with increasing particle size. The dispersion of points around this mean shows the level of diffusion the particles experience, which goes down with increasing particle size as well. The purple bars show the 1σ variation around the mean velocity. The blue circles show the radial equilibrium velocity near the midplane for each particle species grouped into 16 bins using the multispecies NSH solution in Eq. (10). The theoretical velocity values provide a relatively good fit to the mean drift velocity for small particle sizes but are somewhat off for large Stokes numbers.