文献类型：期刊文献

英文题名：Dense particulate flow model on unstructured mesh

作者：Wu, C.L.[1,2]; Zhan, J.M.[2]; Li, Y.S.[3]; Lam, K.S.[3]

机构：[1]Zhongshan Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China;[2]Guangdong Ocean Unic, Coll Engn, Zhanjiang 524088, Peoples R China;[3]Hong Kong Polytech Univ, Dept Civil & Struct Engn, Hong Kong, Hong Kong, Peoples R China

年份：2006

卷号：61

期号：17

起止页码：5726

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000239504800018)、、EI(收录号：2006289999017)、Scopus(收录号：2-s2.0-33745749048)、WOS

语种：英文

外文关键词：discrete particle model; unstructured grid; finite volume method; dense particulate flows; hard-sphere model

外文摘要：A numerical method based on two-dimensional (2D) unstructured meshes is developed to solve the discrete particle model (DPM). Interparticle interactions are taken into account for dense particulate flows, which are described by binary collisions in a hard-sphere model. The particle volume fraction is calculated accurately and physical scalars from the Eulerian grid to the Lagrangian particle positions are mapped through gradient interpolations. The governing equations for the continuous phase are discretized using a finite volume method on an unstructured grid and solved by the algebraic multi-grid (AMG) method. The SIMPLE algorithm employed to solve single-phase flows on unstructured meshes is extended to the pressure-velocity equations. Momentum coupling between the two phases is strongly implicit resulting in a very robust convergence of the AMG solver. Data structuring and mapping techniques for further enhancement of the flexibility and computational efficiency of the numerical model are introduced. Several test cases confirm that the numerical method can be applied to gas-solid and gas-liquid flows in irregular domains without regard to element types of the mesh. The numerical model presented in this paper partly overcomes the difficulties in simulating dense particulate flows using the DPM in 2D irregular domains. (c) 2006 Elsevier Ltd. All rights reserved.