CFD study on hydrodynamics in three-phase fluidized beds—Application of turbulence models and experimental validation

摘要: Abstract CFD simulations of gas–liquid–solid fluidized beds have been performed in a full three-dimensional, unsteady multiple-Euler framework by means the commercial software FLUENT. The simulation results were compared with experimental data obtained from laboratory scale three-phase beds. significance implementing accurate numerical schemes, as well choice available k – e turbulence models (standard, RNG, realizable), solid wall boundary conditions and granular temperature investigated. indicate that order to minimize diffusion artifacts enable valid discussions on physical models, third-order schemes need be implemented. realizable formulation was unable produce expected solids gulf-stream pattern (i.e., rising particles core descending near wall) whereas RNG standard able better capture depictions flow patterns. best prediction characteristics laminar model accounting for phase viscosity molecular viscosities two fluids.