Abstract
The influence of cohesive interparticle force (IPF) on gas dynamics in a bubbling gas-solid
fluidized bed was numerically investigated while the bed hydrodynamics was described with the
help of computational fluid dynamics and discrete element method (CFD-DEM). The model was
validated by experimental results in terms of total bed pressure drop profile, probability density
distribution of instantaneous local bed voidage signals, and Eulerian solid velocity field. The
results showed that the model can satisfactorily predict the hydrodynamics of a bubbling gas-solid
fluidized bed that is impacted by the presence of cohesive IPF. The validated CFD-DEM model
was adopted to delineate the effects of IPF on the distribution of fluidizing gas between the bubble
and emulsion phases and bubble characteristics, such as bubble stability and rise path, which could
hardly be explored experimentally. Simulation results revealed that the presence of IPF in the
bubbling bed alters the distribution of the fluidizing gas between the bubble and emulsion phases
in favor of an increase in the propensity of gas to pass through the bed in the emulsion phase. The
results also indicated that the bubble stability increases and the straight rise path of bubbles
changes to a tortuous path when enhancing IPF.

https://www.sciencedirect.com/science/article/abs/pii/S0263876219304654?via%3Dihub