Abstract
The numerical method developed by Yasuda and Takahira has been improved to consider the real gas effect on the motion of a nonspherical collapsing bubble. The van der Waals equation of state is used for the internal gas in dealing with the real gas effect. The heat transfer of the internal gas and the toroidal bubble dynamics after microjet impact are taken into account in the method. The present method is applied to the collapse of a bubble near a rigid boundary in an oscillatory pressure field. The collapse of a toroidal bubble has been simulated successfully. It is shown that the real gas effect does not appear clearly because of the moderate bubble collapse.
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