Abstract：Numerical analysis and experimental study on the flow characteristics of gas-solid two-phase flow in horizontal pneumatic conveying with dune model were explored. A discrete model (DPM) was used to analyze the particle path, particle concentration and particle velocity vector distribution, and then the particle axial velocity was measured by high-speed PIV. The results show that, the particles are clearly suspended and accelerated by using dune model. The particle axial velocity are higher than that of non-dune on the same air velocity for mounting dune model, and the pressure drops and minimum air velocity are reduced.

Keywords: pneumatic conveying; DPM; particle path; PIV; particle velocity