Results of hydrodynamical simulations for the inviscid (left) and α = 10−4 (right) case. The black line corresponds to the dust surface density determined with DALI (Sect. 4). The (red) dot-dashed line is the 1 mm grains surface density based on the single planet scenario with 0.2 MJ planet at 95 au after 0.65 Myr (Sect. 5). The (blue) dot-dot-dashed and the (green) dashed curves corresponds to the two planets scenario with an inner planet of mass 0.05 and 0.1 MJ , respectively.