考虑颗粒滑动的半持续性接触应力和颗粒碰撞瞬时接触应力对颗粒相应力的贡献，建立了喷动床内颗粒动理学-摩擦应力模型。数值模拟获得了喷动床喷射区、环隙区和喷泉区内颗粒流动特性，模拟计算结果与实验测量结果相吻合。.采用摩擦-动理学颗粒相模型，气体湍流采用k-e模型预测，数值模拟喷动流化床内气体-颗粒流动过程。在喷动流化床中，流化气体进入床内形成气泡，喷射区域高速气体的引流作用，气泡流向射流区，从而增加射流区域气体速度，增加喷射区和喷泉区内颗粒浓度，提高床内颗粒循环流动。模拟结果表明在流化气采用底面法线方向入射时作用效果较好。数值模拟带有导向管的喷动床内气体-颗粒流动过程。结果表明导向管的引入使喷动床层高度升高，导向管内气固流动参数分布更加均匀。.采用CCD高速摄像机(Basler A602fc-2)测量喷动床内颗粒流动过程。采用Image-pro plus5.0对采集到的图像进行处理。实验测量得到喷泉区域内颗粒速度分布。结果表明在喷泉区的中心为向上流动，在喷泉区边缘为颗粒下降流动，形成颗粒的循环流动形式，数值模拟结果与实验结果相吻合。

Flow behavior of gas and particles is simulated in the spouted beds using an Eulerian-Eulerian two-fluid model on the basis of kinetic theory of granular flow. The kinetic-frictional constitutive model for dense assemblies of solids is incorporated. An inverse tangent function is used to provide a smooth transitioning from the plastic and viscous regimes. The distributions of concentration, velocity and granular temperature of particles are obtained in the spouted bed. Simulations show that the results using the kinetic-frictional model are well agreed with experimental results..Flow behavior of gas and particles in the spouted-fluid bed is simulated by a kinetic-friction stresses model, and gas turbulence is simulated by means of a k-e turbulent model. In spouted-fluid bed, with gases enter from the bottom of inverted cone, bubbles are formed in the bed due to the gases enter from the normal direction. The circulation rate of particles will be increased, and the hydrodynamics in the bed are improved. For a spouted bed with a draft tube, numerical results show that the gas flow rate through the annulus increases with the increase of the entrainment zone. The solids circulation rate increases with the decrease of inlet gas velocity and the height of the entrainment zone. The effect of spouting gas velocity on distributions of concentration, velocity and particle circulation is discussed. Simulated results compare with measured vertical velocity of particles and solid circulation rate in the spouted bed with a draft tube. Simulations are in agreement with experimental data..Experiments are performed by a CCD (Basler A602fc-2) in a spouted bed. The spouted bed made of plexiglass for measurements. The sampling time and rate is controlled by a PC. The sampled particle positions are determined by means of the commercial software Image-pro plus 5.0. The velocities of particles are calculated from measured particle position at a given time. Axial and lateral velocities of particles are obtained in the fountain region at the different gas inlet velocities. Data show that particles flow up in the center regime, and down at the periphery of the fountain. Simulations are performed, and are in agreement with experimental data in the spouted bed.

考虑颗粒滑动的半持续性接触应力和颗粒碰撞瞬时接触应力对颗粒相应力的贡献，建立了喷动床内颗粒动理学-摩擦应力模型。数值模拟获得了喷动床喷射区、环隙区和喷泉区内颗粒流动特性，模拟计算结果与实验测量结果相吻合。采用摩擦-动理学颗粒相模型，气体湍流采用k-e模型预测，数值模拟喷动流化床内气体-颗粒流动过程。在喷动流化床中，流化气体进入床内形成气泡，喷射区域高速气体的引流作用，气泡流向射流区，从而增加射流区域气体速度，增加喷射区和喷泉区内颗粒浓度，提高床内颗粒循环流动。模拟结果表明在流化气采用底面法线方向入射时作用效果较好。数值模拟带有导向管的喷动床内气体-颗粒流动过程。结果表明导向管的引入使喷动床层高度升高，导向管内气固流动参数分布更加均匀。采用CCD高速摄像机(Basler A602fc-2)测量喷动床内颗粒流动过程。采用Image-pro plus5.0对采集到的图像进行处理。实验测量得到喷泉区域内颗粒速度分布。结果表明在喷泉区的中心为向上流动，在喷泉区边缘为颗粒下降流动，形成颗粒的循环流动形式，数值模拟结果与实验结果相吻合。