Relative orientation parameter, ξ, as a function of the velocity divergence, ∇·v ≡ ∂_iv_i, in the simulations introduced in Soler et al. (2013). The values of ξ correspond to the relative orientation between ∇ρ and B in ∇·v-bins with an equal number of voxels, all with n> 500 cm^-3. The colors and the symbols follow the conventions introduced in Fig. 1. The gray vertical line, drawn for reference, corresponds to ∇·v = 0 Myr^-1.