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Computational fluid dynamics simulations of interphase heat transfer in a bubbling fluidized bed
Jingdai Wang,Musango Lungu,Jingyuan Sun,Zichuan Zhu,Yongrong Yang 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.7
Numerical simulations based on the Eulerian-Eulerian approach have been performed in the study of interphaseheat transfer in a gas solid fluidized bed. The kinetic theory of granular flow (KTGF) has been used to describethe solid phase rheology. An assessment of drag models in the prediction of heat transfer coefficients shows that nomajor difference is observed in the choice of the drag model used. Fluctuations of the interphase heat transfer coefficienthave been found to be closely related to the bubble motion in the bed. Effects of the wall boundary condition, inletgas velocity, initial bed height and particle size on the predicted heat transfer coefficient have also been investigated. Typical temperature profiles in the bed show that thermal saturation is attained instantaneously close to the gas distributor. Simulated results of the coefficients are in fair agreement with those reported in literature.