Experimental study of a laser-induced cavitation bubble*

Measurement of the mass transfer around a cavitation bubble is particularly challenging due to the small spatial and temporal scales involved. We built a dedicated modular octagonal chamber that can be pressurized while offering optical access for imaging and laser light delivery. Here, we use the non-intrusive laser-induced fluorescence of a dye to probe the flow dynamics around a laser-induced cavitation bubble. By choosing an appropriate dye sensitive to O₂ quenching, we can directly assess the mass transfer around the growing cavitation bubble with a high-speed CMOS camera.