Comparison without dust growth (upper row) and with dust growth (lower row) for the model ℳ₁ with M_⋆ = 0.4M_⊙. The red cross gives the position of the star. The left and middle columns show the total column gas density Σ and the average grain size at the peak of the dust size distribution a_peak similarly to Fig. 1. For the model without growth, the a_peak is the maximum size of the MRN distribution (~250 nm). The right column shows the evolution of the dust size distribution in a cell in the simulation.