Simulation of Water Jet Cutting for Granite by Using Smoothed Particle Hydrodynamics

One of the most advanced methods of cutting materials is water jet cutting. Due to its advantages over other cutting methods, it has been widely used in recent years. Cutting with a water jet is a subset of fluid and structure interaction issues in which water flows into the boundaries of the rock, and this changes the shape of the rock in the impact area. In order to examine this issue accurately, the boundary conditions of water and rock must be coupled in order to obtain the correct behavior of the collision area, which is the most important and complex part of simulation by theoretical, experimental and numerical methods. In this paper, the rock cutting with water jet is simulated using a smoothed particle hydrodynamics method, which is a lagrangian numerical and meshfree method. For this purpose, firstly, the governing equations for fluid and solid are discretized with the help of the predictive-correct algorithm. Then, using the algorithm based on these equations, two-dimensional collision of water jet and rock and breaking behavior of rock are simulated. With this method, the depth and width of the cut can be determined at different speeds of the water jet and the optimal cutting speed of the stone is obtained. The results of the simulation have acceptable accuracy compared to the experimental results and shows that the smoothed particle hydrodynamics method is a suitable method for the analysis of rock cutting with water jet.