Time and radial distance evolution of different quantities in the fiducial model. Panel a: gas (dashed lines) and dust (solid lines) surface density. Panel b: Stokes number of the maximum-size dust particles (solid lines) and the mean Stokes number of the dust particles (dashed lines) at each radial bin. Maximum-size refers to the size of the particle whose surface density is at the peak of the mass bins hereafter. Panel c: midplane density ratio ε (solid lines) and metallicity Z (dashed lines).