Contour plot of the dust property value after coagulation on the i and j grid. This is the same as Fig. 2, but with concrete numbers. The mass and volume have been normalized using monomer units, i.e., m₀ = v₀ = 1. (Left) Contour plot of m_i + m_j. (Middle) Contour plot of effective volume evolution with Okuzumi et al. (2012) model, assuming that the original dust aggregate is compact. (Right) Contour plot of porosity after the coagulation, using the mass and volume from the left and middle panels.