基于格子Boltzmann方法的空泡溃灭过程模拟OA北大核心CSTPCD

To solve the problem of three-dimensional bubble collapse with free boundary condition,the lattice Boltzmann method,combined with pseudo potential multiphase flow model and Carnahan-Starling(C-S)equation of state,was employed as the flow field core solver.Simulation of three-dimensional bubble collapse process was performed at different temperatures and initial collapse radius under constant pressure boundary conditions.The density and pressure contour diagram of the flow field in the process of cavitation collapse were given by simulation,and the relationship between the three-dimensional cavitation collapse time and the radius was quantitatively analyzed.Results show that the initial radius of cavitation is linearly correlated with the total collapse time under constant pressure boundary,and the collapse process of cavitation with different temperatures and initial radius is similar.Under the same temperature condition,the cavitation collapse speed increases with time,and the larger the initial cavity radius,the later the maximum cavity collapse speed occurs.Under the same radius condition,the larger the temperature ratio,the later the maximum cavitation collapse speed appears.