Evaluation of a three-dimensional numerical model of a scaled circulating fluidized bed

This work concerns the evaluation of a numerical model of a scaled circulat ing fluidized bed (CFB) with a square cross section. The evaluation consist s of a comparison of the numerical results with measurements achieved using laser Doppler anemometry (LDA) and pressure taps. The CFB is fluidized usi ng metal particles, which enable the laboratory-scale CFB to be operated un der scaled conditions of a full-scale CFB. The numerical part is based on a three-dimensional multiphase computational fluid dynamics (CFD) model that uses an Eulerian description for the gas and solid phases. The conservatio n equations for the solid phases are based on the kinetic theory for granul ar flow, which provides adequate modeling of the solid phase when the Euler ian approach is used. Three-dimensional simulations. are found to be superi or to two-dimensional simulations in comparisons to the experimental findin gs.