Particle rotation

which has been less considered in particle kinetic model

plays an important role in gas-solids flow.Kinetic theory of rough spherical particles was proposed on the basis of kinetic theory of gases and kinetic theory of granular flow with the consideration of energy transport and dissipation by collision of particles.The models for solids phase stress

thermal flux and collisional energy dissipations of particles were presented by using Chapman-Enskog velocity distributions.Flow behavior of gas and particles was simulated by gas-solids two-phase flow model in a bubbling fluidized bed.Predicted velocity distribution and fluctuating velocity of particles were in agreement with experimental data measured by Yuu et al (2000)in a bubbling fluidized bed.The distribution of granular temperature

changing with concentration tended to be similar with the prediction by kinetic theory of granular flow.The effect of tangential restitution coefficient on fluctuating energy of particles was analyzed.Simulated results showed that at a low concentration of particles the fluctuating kinetic energy of particles increased with increasing tangential restitution coefficient.