Thermodynamic influences of bubble contents on bubble collapse

On the assumption that mass and heat transfer was neglected and instant thermal equilibrium was satisfied, different thermal state models for contents within a bubble were introduced when numerically studying a bubble axisymmetrically collapsing near a rigid wall. Fluid fields were controlled by full Navier-Stokes equations. Moving bubble walls were tracked by the volume of fluid method with piecewise linear interface construction and time unsplit propagation. Detailed dynamics information of bubble collapse, such as pressure pulses and high-speed micro fluid jets, was obtained. Among the thermal state models: isothermal, adiabatic and pseudo-adiabatic, adiabatic processes led to the most severe restraint to bubble collapse and substantially reduced cavitation erosion in some cases. In adiabatic processes and those similar, bubble rebounds appeared.