Numerical research on flow features of gas–solid flow of cylindrical particles. (21st September 2016) - Cai, Jie
Abstract: 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 κ – ε 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 κ – ε 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. Graphical abstract: Highlights: A three-dimensional two-way coupling model of gas–solid flow of cylindrical particles was established according to DEM, rigid dynamics, RNG κ – ε model. The three-dimensional interaction between cylindrical particles was established using rigid dynamics and modified Nanbu method. 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 obtained.