Numerical research on flow features of gas-solid flow of cylindrical particles

The flow features of gas solid flow of cylindrical particles are essential. In the present work, a three-dimensional two-way coupling model was established for the gas solid flow of cylindrical particles. Discrete Element Method (DEM), rigid dynamics and RNG kappa - epsilon model were applied. Meanwhile, the force and motion model was established based on DEM and rigid dynamics, respectively. The two-way coupling correlation between cylindrical particles and turbulent flow was considered, which was established based on the correlation between Lagrangian time scales and kappa - epsilon model. The interaction between cylindrical particles was taken into account using the rigid dynamics and the modified Nanbu method. The model was verified by a cold-state fluidization experiment of gas-solid flow of cylindrical particles in a riser. In addition, some rheological properties of gas-solid two-phase turbulent flow such as pressure distribution, velocity distribution and turbulent kinetics along the axis of the riser were investigated using the model. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.