Influence of liquid compressibility on the dynamics of single bubble sonoluminescence

摘要

The main effects of liquid compressibility on the dynamics of single bubble sonoluminescence are investigated via three different radial dynamics models. In order to precise description of the interior gas thermodynamics, a hydrochemical model is used. In the case of an argon gas bubble in water, the results obtained with the Gilmore model and the Lezzi and Prosperetti model are compared with those resulting from the Keller and Miksis model. It is shown that the variation of liquid density at bubble surface in a very short time interval around the end of the bubble collapse, which has been incorporated into the first two models, strongly influences the bubble cavitation dynamics at higher acoustic amplitudes. The simulation results denote an increase in the bubble temperature and pressure and a reduction in the bubble minimum radius, compared with those ones obtained with Keller and Miksis model. As the acoustic amplitude increases, the difference between the models becomes larger. Moreover, it is shown that increasing the bubble ambient radius leads to an improved match between the results of the models. (C) 2018 Published by Elsevier B.V.