化工学报2019，Vol.70Issue(5)：1702-1712,11.DOI:10.11949/j.issn.0438-1157.20180962
coarse-grained CFD-DEM方法在不同流态流化床中的模拟验证
Verification of coarse-grained CFD-DEM method in multiple flow regimes
摘要
Abstract
The computation load for traditional computational fluid dynamics-discrete element method (CFD-DEM) simulations tremendously increases when the number of particles augments in the system. The coarse-grained CFD-DEM method, in which a number of real particles are lumped into a numerical parcel, can remarkably reduce the computation load. It is necessary to extensively verify the coarse-grained CFD-DEM method before it is applied. Therefore, in the current work, the coarse-grained CFD-DEM method is validated in fluidized beds with various fluidization regimes. On one hand, it is found that gas and solid features (i. e., void fraction, pressure signals, and particle velocity) obtained from this method match well with the experiment measurements. On the other hand, as the coarse-grained ratios increase, the calculation time for a specific case is significantly reduced. In summary, the coarse-grained CFD-DEM contributes a great improvement of calculation efficiency while a little loss of numerical accuracy, which is expected to be a powerful tool to simulate gas-solid flow dynamics in large-scale dense particulate systems.关键词
coarse-grained方法/离散单元法/计算流体力学/流化床/气固两相流/计算效率Key words
coarse-grained method/DEM/CFD/fluidized bed/gas-solid flow/computational efficiency分类
化学化工引用本文复制引用
林俊杰,罗坤,王帅,胡陈枢,樊建人..coarse-grained CFD-DEM方法在不同流态流化床中的模拟验证[J].化工学报,2019,70(5):1702-1712,11.基金项目
国家重点研发计划项目(2017YFB0601805) （2017YFB0601805）
