One-dimensional bubble model of pulsed discharge in water

In this paper, a one-dimensional bubble model of pulsed discharge in water is presented. With a total input energy of 0.63 J, the simulation results show that when the bubble collapses at the center of the bubble, the plasma pressure oscillates strongly. It oscillates between 800 and 1150 atm with an oscillation frequency of about 6.9 MHz, while at r=R/2 (R: bubble radius), the gas velocity oscillates intensely at the same frequency. It oscillates between -235 and 229 m/s when the bubble radius reaches its minimum. But it does not oscillate at r=R because of the inertia of the surrounding water. The bubble collapses and reexpands with almost the same speed as that of the zero-dimensional (0D) model. This further confirms why the shock wave pressure from the 0D mode has a good agreement with the experimental results since the shock wave pressure is only determined by the bubble wall velocity v(R).(C) 2007 American Institute of Physics.