Simulation of the Plasma Generated in a Gas Bubble
The plasmas generated in water involve various physical phenomena such as flows agitated by bubbles, high electric fields for breakdown, discharges in bubbles with size variation, and so on. In this paper, studies have been made on the simulation of plasmas generated in bubbles with size variation. The species taken in account include electrons, three kinds of ions, and ten kinds of neutral (molecule, radical, excited) species. 43 chemical reactions are considered. The time evolution of bubble size is simulated using the moving mesh method provided in COMSOL Multiphysics®. The plasma properties during the variation in bubble size are obtained. The effect of the duration for variation in bubble size and the maximum bubble size on discharge properties is examined.
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