CFD simulation of fluidization quality in the three-dimensional fluidized bed  

作　　者：Kai Zhang Stefano Brandani Jicheng. Bi Jianchun Jiang 

机构地区：[1]State Key Lab of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China [2]IMP-SEE, University of Edinburgh, The King＇s Buildings, Edinburgh EH9 3JL, UK [3]State Key Lab of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China [4]Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China

出　　处：《Progress in Natural Science:Materials International》2008年第6期729-733,共5页自然科学进展·国际材料（英文版）

基　　金：National Key Technology R＆D Program of China （2006BAD07A0301）;National Natural Science Foundation of China （20476057 and 20490200）;Key Laboratory of Coal Conversion （04-202）is gratefully acknowledged.

摘　　要：Multiphase computational fluid dynamics （CFD） has become an alternative method to experimental investigation for predicting the fluid dynamics in gas-solid fluidized beds. The model of Brandani and Zhang, which contains additional terms in both the gas- and solidphase momentum equations, is employed to explore homogeneous fluidization of Geldart type A particles and bubbling fluidization of Geldart type B particles in three-dimensional gas-fluidized beds. In this model, only a correlation for drag force is necessary to close the governing equations. Two kinds of solids, i.e., fine alumina powder （dp= 60 μm and pp = 1500 kg/m^3） and sand （dp = 610 μm and pp = 2500 kg/m^3）, are numerically simulated in a rectangular duct of 0.2 m （long） × 0.2 m （wide）× 0.5 m （high） size. The results show good agreement with the classic theory of Geldart.Multiphase computational fluid dynamics(CFD)has become an alternative method to experimental investigation for predicting the fluid dynamics in gas-solid fluidized beds.The model of Brandani and Zhang,which contains additional terms in both the gas-and solid-phase momentum equations,is employed to explore homogeneous fluidization of Geldart type A particles and bubbling fluidization of Geldart type B particles in three-dimensional gas-fluidized beds.In this model,only a correlation for drag force is necessary to close the governing equations.Two kinds of solids,i.e.,fine alumina powder(dp=60 lm and qp=1500 kg/m3)and sand(dp=610 lm and qp=2500 kg/m3),are numerically simulated in a rectangular duct of 0.2 m(long)0.2 m(wide)0.5 m(high)size.The results show good agreement with the classic theory of Geldart.

关 键 词：Three-dimensional gas-solid fluidized bed Fluidization quality CFD simulation 

分 类 号：O645[理学—物理化学]