Time evolution of the non-magnetic model. The top row shows the initial snapshot, with subsequent time snapshots taken every 20 ks. The left column shows the temperature in kelvins, the middle column shows the horizontal flow velocity, and the right column shows the vertical flow velocity in cm s^−1. Red colour in the middle panel represents lateral motion of the gas to the right and blue represents motion to the left. Likewise, the red colour in the right panel represents upward flow while blue represents downward motion.