中文摘要：

引言 鼓泡流化床技术广泛用于化工、能源、环境以及颗粒干燥等工业应用领域。在鼓泡流化床中，存在由固体颗粒和气体组成的乳化相及以气泡状态出现的气泡相，气固流态化呈现非均匀性。这种非均匀流动结构对于流化床内的动量、热量和化学反应速率等影响很大。

英文摘要：

A second-order moment model of particles in dense gas-solid flow is proposed based on the kinetic theory of granular flow. The solid phase constitutive model is closed with the approximated thirdorder moment enclosure equation of particle velocity from the elementary transport theory. The boundary conditions of particles are proposed in considering the energy transfer and dissipations by collisions between the wall and particles. Flow behavior of particles is numerically simulated in a bubble fluidized bed, which indicates the distinct anisotropy behavior of the turbulent particles. Simulated particle velocities are in agreement with the measurements by Muller et al （2008） and Yuu et al （2001） . Predicted secondorder moment of velocity has the same trend as that of measurements. The calculated Reynolds stresses per unit bulk density agree with the measured data by Muller et al （2008） and with the fluctuating velocity of particles measured by Yuu et al （2001）.