Understanding coal combustion and gasification modeling in commercial CFD codes

Coal gasification and combustion modeling in commercial Computational Fluid Dynamic (CFD) codes has been developed by many engineers and researchers. In order to realize coal gasification phenomena, CFD model is used including fluid flow, heat and mass transfer, and chemical reactions. Among some CFD codes, most gasifiers are modeled commercial FLUENT CFD software. The results obtained show good agreement for both the main and minor species, and temperature relatively. Although the models give these informations, there are limitations and uncertainties using CFD code. Coal gasification and combustion phenomena are multiphase reactions. To understand multiphase flow modeling, two representative modeling methods, Euler-Lagrange and Euler-Euler approaches, are introduced. In this paper, these factors are investigated through previous researches and examples. Finally, development possibility of conventional CFD model are indicated with complements.