Hydrodynamics of a Freely Bubbling Fluidized Bed Numerical Simulation Based on Particle-particle Drag Force Model

Euler-Euler two-fluid model is used to numerically investigate the flow dynamics of gas-solid two-phase flow in a freely bubbling fluidized bed with two different sizes particles and a uniform gas inlet.The particle-particle drag model is used to analyze the characteristics of large and small particles particle segregation.Numerical results indicate that gas can fully interact with solid phase.It is more reasonable to forecast the gas-solid two-phase characteristics with this kind of drag model.