The Euler-Euler model and turbulent model in the theory of gas-solid two-phase flow are used in this paper to deal with plugging which often appears in dense phase conveying process.The rule of the concentration of traditional Chinese medicine granules within L-type pipeline is numerically simulated by using the Fluent software to do the finite element analysis.Then the influences of the velocity of gas and the initial volume of particles on the concentration distribution inside the L-shaped pipe and partic...