Simulation and Optimization of Sand Mixing Device

In response to the requirements for rapid mixing and erosion resistance of sand mixing devices used in hydraulic fracturing at high flow rates, computational fluid dynamics methods and discrete multiphase flow models were used to conduct three-dimensional unsteady simulations of the internal flow field of commonly used typical sand mixing devices. The mixing efficiency and sand particle motion trajectory were obtained, and the erosion wear on the inner wall of the sand mixing device was obtained through the DPM erosion model. On this basis, the influence of blade quantity, length, and angle on the erosion and wear life of the device is explored. The research results indicate that the optimal combination of 4 long and 4 short blades with an inclination angle of 60 ° increases the erosion life by 54% with an increase in the number of blades and the structure of the long and short blades. At this point, the lifespan of the impeller mixed with sand is 401 hours.