Effects of inner bubble on liquid jet breakup

In this study, the effects of the bubble on the liquid jet breakup process were investigated using a high-speed camera. The liquid jet containing bubbles revealed a considerable decrease in the breakup length when compared with the water jet without bubbles, which promoted the atomization performance significantly. Theoretical analysis was based on the classical linear stability theory and the equivalence of the initial jet diameter and velocity disturbance amplitude. We deduced a correlation between the breakup length ratio and the diameter of the bubbles, and the theoretical results showed good agreement with our experimental results. Our results also showed that the property of gas affected the breakup process of the liquid jet containing bubbles. The experimental findings indicated that lighter gases could realize a more significant decrease in the breakup length, which could then be attributed to the conservation of momentum of the fluid.