A hybrid drag model for studying hydrodynamics in a 2D gas-solid tapered fluidized bed

Solids Mixing in Tapered Fluidized Beds: Experiment and Computational Fluid Dynamics Simulation

“…Sahoo and Sarkar introduced a novel hybrid drag model by combining Ergun’s conventional correlation, which assumes homogeneity, with a more complex bubble-based drag formulation that accounts for heterogeneity. They conducted a comparative analysis of several drag models, including the hybrid model, Gidaspow, and energy minimization multiscale (EMMS) drag models, to assess their performance in predicting various parameters.…”

Experimental Investigation and CFD–DEM Simulation of Solids Mixing in Tapered Fluidized Beds

“…To enhance the design of three-phase tapered fluidized bed systems, the investigators developed correlations using statistical analysis. Sahoo and Sarkar 34 proposed a hybrid drag model in a 2D gas−solid tapered fluidized bed by combining homogeneous Ergun correlation and heterogeneous bubble-based drag formulation. This model predicts parameters including the bubble size, bubble fraction, bed expansion ratio, particulate fluidized area fraction, and solid volume fraction closer to the experimental findings.…”