Break-up induced by the collapse of laser-generated cavitation bubbles in a liquid jet

Paper in proceeding, 2020

In this paper, the effect of artificially introduced cavitation bubble collapse on jet break-up was studied. Laser-induced cavitation bubbles were introduced into the jet at the exit of a scaled-up nozzle. Shadow images of the jet or spray were recorded by a high-speed video camera. The break-ups, which were induced by bubble collapse, were measured, compared and analyzed under different injection pressures and bubble generating positions. The study shows how the collapsing laser-induced cavitation bubbles outside of the nozzle affect jet break-up. The break-ups were categorized into two characteristic types. The distance of the laser focus to the center axis of the nozzle was found to be the main factor that determined the type of break-up.