2D simulation survey of the effect of a pressure bump on dust evolution. Shown is the final location of within the domain 0.8 ≤ R ≤ 1.2 and its value is indicated through the coloring. The different panels along the vertical direction compare different metallicities, while those along the horizontal direction compare different Stokes numbers. Within each panel different amplitudes A are compared. In cases where two dots are shown, the original dust ring has produced a secondary ring through a dusty gas instability, as described in the text.