Role of ambient pressure on bouncing and coalescence of colliding jets

In this Letter, the merging vs bouncing response of obliquely oriented colliding jets under elevated and reduced gaseous environment pressures was experimentally examined. Experiments with water n-tetradecane confirmed that collision outcome transitions from to then again, when impact velocity increased. This behavior which previously reported for atmospheric pressure has now also been observed at pressures. New results show there exists a critical (0.9 bar 5 water) below increasing promotes (expands regime), while beyond this, is promoted (reduces regime) instead. leads non-monotonic influence on non-coalescence outcomes collisional jets, not reported. The study provides evidence new behaviors in pressures, differs well-studied droplet–droplet collisions.