Eulerian simulation of a circulating fluidized bed with a new flow structure-based drag model

摘要: Abstract The heterogeneous flow in a circulating fluidized bed (CFB) deteriorates momentum, combined with its heat and mass transfer between gas solid, have been confirmed by several experiments. Due to no consideration of this Euler–Eluer two phase model, there are the significant deviation average voidage simulating results experimental data. Therefore, we developed new model evaluate local parameters, based on which gas–solid drag force coefficient calculating mesh was calculated. This these structure parameters improves greatly, further is better description With nature axial S-shape radial core-annular distribution solid concentration CFB can be captured.