Density-weighted maps of the gas radial velocity in edge-on projections of the nine simulations at t = 0.5 Gyr. Each panel is 70 kpc × 40 kpc and with a projection depth of 70 kpc with a resolution of ∼70 pc. The velocities go from −150 km s⁻¹ (inflows, blue) to 150 km s⁻¹ (outflows, red) as in central panel of Fig. 4. These projections clearly show the presence of galactic fountains in the simulations.