中南大学学报（自然科学版）2017，Vol.48Issue(6)：1667-1673,7.DOI:10.11817/j.issn.1672-7207.2017.06.034
异质柱形颗粒与球形颗粒混合流动特性的CFD-DEM数值模拟分析
Simulation study on characteristics of cylinder-shaped particles and sphere-shaped particles flow
摘要
Abstract
A numerical simulation method was used to describe and analyze the mixing flow of biomass particle and quartz sands in gas-solid fluidized bed.Three-dimensional gas-solid flow models were constructed to simulate the mixed flow of heterogeneous particles in mesoscopic scale.The integrated model was built in an Eulerian-Lagrangian approach and the constructed methods of cylinder-shaped particles were different when it came to different numerical methods.Each cylinder-shaped particle was constructed as an agglomerate of fictitious small particles in CFD part,while in DEM method,cylinder-shaped particles were built by multi-sphere method,in which small sphere element merged with each other.Soft sphere model was used to get the connect force between particles.The total connect force of cylinder-shaped particle was calculated as the sum of the small sphere particles' forces.Two models with different superficial gas velocities (1.0 m/s and 2.0 m/s) were built and the results of simulation were compared with the experimental results.The results show that the present work provides an effective approach to simulation the flow of two component particles.关键词
CFD-DEM模拟/柱形颗粒/气固流化床Key words
CFD-DEM simulation/cylinder-shaped particle/gas-solid fluidized bed分类
化学化工引用本文复制引用
王恒,仲兆平,王佳,王泽宇,王肖祎,朱玲莉..异质柱形颗粒与球形颗粒混合流动特性的CFD-DEM数值模拟分析[J].中南大学学报（自然科学版）,2017,48(6):1667-1673,7.基金项目
国家自然科学基金资助项目(51276040,U1361115)(Projects(51276040,U1361115) supported by the National Natural Science Foundation of China) （51276040,U1361115）
