Notes. Rms RV are computed at disk center for different parameters. S_lim indicates the minimum size above which the rms is considered to be constant (see discussion in Sect. 2.4.1). λ_S characterizes the size distribution of granules: when multiplied by two, granules are on average twice as large, but their lifetime follows the same law versus S as in the default simulation. Similarly, τ indicates that the lifetimes are the default value or multiplied by 2. Finally, the size distribution is either the default value or truncated at small sizes (see Sect. 3.1.4 for discussion). The rms RV are computed as in Table 1.