Visualizations of radial velocity in 2D simulations (from left to right) bg2D, wm2D, dcs2D, and cc2D. Outward flows are indicated in pink, while inward flows are in blue; the zero point in velocity is black. The maximum and minimum values of the color scale are defined by a radial velocity magnitude near the maximum for each simulation: bg2D (±6.5 km/s), wm2D (±2.9 km/s), dcs2D (±0.63 km/s), cc2D (±1.5 km/s).