Two jets are placed opposed to each other and their interaction process is studied in water using particle image velocimetry (PIV). A fully developed pipe flow exists at the exit. Averaged in time the radial jet will go in the direction perpendicular to the direction of the jets. However, the instantaneous velocity field of the radial jet for both angles is highly unstable. A comparison between the two angles and a single jet is also conducted. The results are compared to the laboratory experiment that simulates a personal ventilation system with two opposing jets supplying fresh air to the occupant.

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