Development and Collapse of a Bubble Generated by Pulsed Laser in Water

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  • パルスレーザによって作られた水中気ほうの生成および崩壊過程
  • パルス レーザー ニ ヨッテ ツクラレタ スイチュウ キホウ ノ セイセイ オ

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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.

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