Coarse-Grained DEM–CFD Simulation of Fluidization Behavior of Irregular Shape Sand Particles,Industrial & Engineering Chemistry Research

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Coarse-Grained DEM–CFD Simulation of Fluidization Behavior of Irregular Shape Sand Particles
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-06-17 , DOI: 10.1021/acs.iecr.2c00891
Xiaomeng Xu _{1,

2} , Cheng Li _{3,

4,

5} , Xi Gao _{1,

2,

5}

Affiliation

Accurate modeling and simulation of irregular shape sand particle fluidization are challenging as particle shape-resolved simulation is complex and time-consuming. In this study, the coarse-grained discrete element model (CG-DEM)-computational fluid dynamics (CFD) was adopted to improve the computational feasibility of traditional CFD–DEM and simplify the mathematical modeling by lumping a certain amount of physical particles into a numerical parcel. 3D CGDEM–CFD simulated the fluidization behavior of irregular shape sand particles in a fluidized bed, and several key parameters or model settings were assessed to identify critical model factors. Moreover, the impact of the model parameters on hydrodynamics was quantified by comparing the simulation results with the experimental data. The results demonstrate that applying a rolling friction model can increase the simulation accuracy of the fluidization behavior of non-spherical sand particles.

中文翻译：

不规则形状砂粒流化行为的粗粒度 DEM-CFD 模拟

由于颗粒形状解析模拟复杂且耗时，因此对不规则形状砂粒流化进行精确建模和模拟具有挑战性。本研究采用粗粒度离散元模型（CG-DEM）-计算流体动力学（CFD）来提高传统CFD-DEM的计算可行性，并通过将一定数量的物理粒子集中到一个数字包裹。3D CGDEM-CFD 模拟了流化床中不规则形状砂粒的流化行为，并评估了几个关键参数或模型设置以识别关键模型因素。此外，通过将模拟结果与实验数据进行比较，量化了模型参数对流体动力学的影响。

更新日期：2022-06-17

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