A comprehensive comparison of Two-Fluid Model, Discrete Element Method and experiments for the simulation of single- and multiple-spout fluidized beds

We employ a two-fluid model (TFM) as well computational fluid dynamics coupled to discrete element method (CFD-DEM) approach study the time averaged hydrodynamics of single- and multiple-spout fluidized beds. Simulations are validated against experimental data (van Buijtenen et al., Numerical on beds, Chemical Engineering Science 66 (2011) 2368–2376) with four different interphase drag correlations. The kinetic theory granular flow used for solving motion solid phase in TFM, includes realistic particle–wall boundary conditions momentum transfer flux pseudo-thermal energy. Frictional stresses TFM modelled based μ(I)-rheology. propose new ad hoc modification μ(I)-rheology account effect rolling friction TFM. In contrast, CFD-DEM is accounted by an additional torque. Our results show that there good agreement between both approaches respect volume fraction, solids velocities, fluxes temperature.