CFD simulation of a spouted bed: Comparison between the Discrete Element Method (DEM) and the Two Fluid Model (TFM)
CFD simulation of a spouted bed: Comparison between the Discrete Element Method (DEM) and the Two Fluid Model (TFM)
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DOI：
10.1016/j.cej.2018.11.164
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发表时间：
2019-12
影响因子：
15.1
通讯作者：
C. Moliner;Filippo Marchelli;Nayia Spanachi;A. Martinez-Felipe;B. Bosio;E. Arato
中科院分区：
文献类型：
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作者：
C. Moliner;Filippo Marchelli;Nayia Spanachi;A. Martinez-Felipe;B. Bosio;E. Arato
采用CFD-TFM和CFD-DEM两种计算流体力学模型对喷动床进行了数值模拟，并与文献数据进行了比较和验证，模拟结果与实验结果吻合较好。这两种模型都能够预测床的动态从静态到稳定的喷动条件下，即使观察到固体体积分数或速度分布的一些差异。总的来说，CFD-DEM更好地再现了实验测量，并且由于床中的颗粒数量少，因此在两种情况下的计算工作量被证明是相似的，因此优选描述本喷动床。然而，在较大的系统中，CFD-DEM可能不那么方便，需要在应用此模型或替代模型之前评估准确度和计算成本。
A spouted bed was simulated through two Computational Fluid Dynamic models: CFD-TFM and CFD-DEM. The two models were compared and validated with data from literature, showing good agreement between experimental and simulated results. Both models were able to predict the dynamics of the bed from the static situation to stable spouting conditions, even though some discrepancies in the solid volume fraction or velocity profiles were observed. Overall, CFD-DEM reproduced better the experimental measurements, and, since the computational effort was proved to be similar in both cases due to the low number of particles in the bed, it was preferred to describe the present spouted bed. In larger systems, however, CFD-DEM might not be so convenient, requiring the evaluation of the degree of accuracy and the computational costs prior to the application of this or alternative models.