Upper panels: dust density distribution at 2.5 Myr of evolution when a 20 M_Jup planet is embedded in the inner disk (10−15 AU) and a second planet (15 M_Jupleft panels, 20 M_Jupright panels) is injected in the outer region (r_p2 ≳ 70 AU) after 2 Myr of dust evolution. The white line is St = 1, and the blue line is a_frag. Bottom panels: real part of the visibilities at λ = [0.87,1.0,3.0,7.0] mm at different times of dust evolution; ALMA Cycle 0 and ATCA data are over-plotted for comparison.