CFD simulations of gas-solid flow in an industrial-scale circulating fluidized bed furnace using subgrid-scale drag models

- Coarse mesh simulations for large circulating fluidized bed furnace were performed.
- Macroscopic drag model provided a limit for coarse mesh closure for this study.
- Applied subgrid-scale drag models show improvement over Ergun/Wen-Yu model.
- Approximation of one particle size in wide particle size distribution is difficult.