An energy minimization and multi-scale model

bubble-based EMMS/PFB

was established for pressurized fluidized-bed

based on methods of multi-scale decomposition and energy consumption analysis in combination with bubble diameter correlation to conical distributor. The model was used to simulate a 2D pressurized jetting fluidized-bed and to study influence of operating parameters such as operating pressure

bubble location

porosity and residual velocity on heterogeneous index. Comparison of simulation results to experimental data

it was showed that the new model provided better accuracy than the Gidaspow model in prediction of solid particle concentration distribution and change of particle velocity adjacent to wall above the distributor. Dense section simulation of a pressurized fluidized-bed by the new drag model yielded prediction of instantaneous and time-averaged axial distributions of particle concentration and particle velocity distribution. The simulation could make it available to visualize gas-solid flow behavior at dense section and provide guidance for design and industrial scale-up of pressurized fluidized-beds.