A Study of the Influence of Thermodynamic Parameters on the Dynamics of Cavitation Bubbles

Numerical studies on the dynamics of bubble clusters in a compressible fluid, including interfacial heat and mass transfer, were performed to investigate the behaviour of bubble clusters in cavita-tion devices. The influence of operational and system parameters on the intensity of cavitation processes was considered. Physicochemical transformations during the cavitation treatment of liquids are caused not only by the action of shock waves and emitted pressure pulses but also by extreme thermal effects. At the stage of ultimate bubble compression, the vapour inside the bubble and the liquid in its vicinity transition to a supercritical fluid state. The presented model analyses the nature of microflows in the inter-bubble space and performs a quantitative calculation of the local values of velocity and pressure field parameters.