パルスレーザーによって作られた水中気泡の生成および崩壊過程

抄録

A bubble collapse phenomenon in water is photographically investigated using a high-speed framing camera (200, 000 frames/sec).The bubble was generated by focusing the beam of a pulsed ruby laser (22 nsec, 0.88 J, 40MW). It was found that the total collapse time of the bubble (initially 2.5mm in radius) is about 200 μsec, providing a reasonably good agreement with the collapse time 227 μsec obtained through the RAYLEIGH's analytical solution.