Density-weighted maps of the high-metallicity (Z > 0.9 Z_⊙) gas radial velocity in edge-on projection of the gal simulation at t = 0.8 Gyr. The velocities range from −150 km s⁻¹ (inflows, blue) to 150 km s⁻¹ (outflows, red) as in central panel of Fig. 4. The projection clearly highlights how the accreted gas is not pristine material coming from the CGM, but is rather a mixture of the latter with gas that was previously ejected from the disc.