Thermodynamic of collapsing cavitation bubble investigated by pseudopotential and thermal MRT-LBM

•The pseudopotential and thermal MRT–LBM is adopted to investigate the thermodynamics of a collapsing cavitation bubble.•The temperature evolution of the vapor–liquid phase is effectively captured.•The temperature, pressure and velocity fields of the bubble near a wall are simulated.•The effects of initial radius, pressure difference and offset parameters on wall temperature and maximum bubble temperature are discussed. The thermodynamic of cavitation bubble collapsing is a complex fundamental issue for cavitation application and prevention. The pseudopotential and thermal multi-relaxation-time lattice Boltzmann method (MRT-LBM) is adopted to investigate the thermodynamic of collapsing cavitation bubble in this paper. The simulation results satisfy the maximum temperature equation of the bubble collapse, which derived from the Rayleigh-Plesset (R-P) equation. The validity of thermal MRT-LBM in simulating the collapse process of cavitation bubble is verified. It shows that the temperature evolution of vapor-liquid phase is well captured. Furthermore, the two-dimensional (2D) temperature, velocity and pressure field of the bubble near a solid wall are analyzed. The maximum temperature inside the bubble and wall temperature under different position offset parameters are discussed in details.