Computational Fluid Dynamic Simulation of Hydrodynamic Behavior in a Two-Dimensional Conical Spouted Bed
Computational Fluid Dynamic Simulation of Hydrodynamic Behavior in a Two-Dimensional Conical Spouted Bed
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DOI：
10.1021/ef100612r
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发表时间：
2010-11
期刊：
影响因子：
5.3
通讯作者：
S. Hosseini;G. Ahmadi;Behzad Saeedi Razavi;Wenqi Zhong
中科院分区：
文献类型：
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作者：
S. Hosseini;G. Ahmadi;Behzad Saeedi Razavi;Wenqi Zhong
采用结合颗粒流动动力学理论的欧拉-欧拉双流体模型（TFM）研究了二维锥形喷流床的流体动力学。研究了不同类型的摩擦应力模型、交换系数以及不同值的恢复系数作为建模参数的影响。对非相干和稳态喷流进行了分析，评价了喷流区域纵向颗粒速度沿轴向分布、横向轴向颗粒速度沿轴向分布以及不同层位颗粒温度分布等流体动力特性。比较了锥形喷淋床与圆柱喷淋床的流体力学模拟结果，讨论了两者的异同。仿真结果与实验数据的比较显示出较好的一致性。
The hydrodynamics of a two-dimensional conical spouted bed was studied using an Eulerian−Eulerian two-fluid model (TFM) incorporating the kinetic theory of granular flows. Influences of various types of frictional stresses models, exchange coefficients, as well as different values of the restitution coefficient were investigated as modeling parameters. Incoherent and steady spouting were analyzed, and the hydrodynamic properties such as longitudinal profiles of the vertical particle velocities along the axis, the lateral axial particle velocities in the spout region, and distribution of granular temperature at various bed levels were evaluated. The simulated hydrodynamics of the bed with a conical base were compared with those with cylindrical spouted beds, and their similarity and differences were discussed. Comparison of the simulation results with the experimental data showed fairly good agreement.