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Discrete Element Method (DEM) plays an important role in understanding and modeling the kinetic characteristics in granular systems.A soft-sphere method with a linear spring-dashpot model was used in the simulation of a bubbling fluidized bed.The time-averaged granular temperature and vertical velocity at different height were numerically studied and compared to experimental measurement of Müller et al.The influence of different drag models and a velocity-dependent coefficient of restitution were investigated in this work.Good agreements were found between the DEM simulation and Müllers experiment,especially using the DiFelice drag model and a constant coefficient of restitution.By comparing the granular temperature in the z direction and in the x direction,a strong anisotropy presents in the bed.