Extending EMMS-based models to CFB boiler applications

► This paper proposed a revised cluster model through re-defining the energy input, for predicting CFBB flows with low solids flux. ► For verification, the revised cluster model was used in EMMS-based drag model to simulate CFBB flows. ► The modified EMMS-based model can capture reasonably well the bubbling-like behavior in the bottom part of CFBB.