Simulation study of laser and waterjet coupling process and energy change

In this study, a multiphysics coupling model of laser total reflection within the waterjet is established. The temperature dependence of the absorption coefficient of water on the laser is analyzed, and the effects of the energy absorbed by the waterjet and the change of the propagation path when the temperature changes are considered. Numerical simulations are carried out using COMSOL Multiphysics, and the temperature and energy field distributions in the laser propagation process are obtained. The results show that the laser propagation process in the waterjet exhibits strong coupling. The energy loss of laser propagation in the waterjet is positively related to the incident laser energy and negatively related to the incident waterjet pressure.