Distribution and dynamic characteristic of particle group with different concentration in structural flow passage

Because of the driving action of liquid phase, particles will be collided the surface and impacted with each other in the flow passage, then the surface will be machined though this continuous action of impact force and friction force. Based on the coupled theory of liquid-solid two phases flow, mixture model which belongs to Euler-Euler multiphase flow model and realizable k-ε turbulence model were used to analyze turbulent effects of liquid-solid two-phase flow in the wall area, and some parameters such as turbulent velocity and turbulent energy were calculated with different particles concentration in the flow passage which had V-shaped texture and semicircular cross-section. Simulation results showed that 1) turbulence could be improved by assembling V-shaped constrained component; 2) as the concentration of particles increased, particles velocity would be increased in a certain range, turbulent energy reduced gradually, and amplitude of particles volume fraction is also decreased; and 3) the concentration of particles should be selected properly and different particles distribution and finishing performance would be obtained with different particles concentration.