Verification of coarse-grained CFD-DEM method in multiple flow regimes

被引：0
|
作者：
Lin J. [1 ]
Luo K. [1 ]
Wang S. [1 ]
Hu C. [1 ]
Fan J. [1 ]
机构：
[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 05期
关键词：
CFD; Coarse-grained method; Computational efficiency; DEM; Fluidized bed; Gas-solid flow;
D O I：
10.11949/j.issn.0438-1157.20180962
中图分类号：
学科分类号：
摘要：
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. © All Right Reserved.
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页码：1702 / 1712
页数：10
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