Abstract

The bubble radius at the early stage of discharge in water is investigatedusing high-speed photography. Some simulation results on the bubble radius arepresented, which are in agreement with the experimental results, with a maximumdifference of about 10%. The reasons why the peak pressure of the firstshock wave is only related to the energy released in the bubble during thefirst half period are addressed. The energy released in the bubble after thefirst half period increases the bubble pulsation period, but it produces nomore than 10% under the peak pressure of the second shock wave.

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