Hydrodynamic validation study of filtered Two Fluid Models
Hydrodynamic validation study of filtered Two Fluid Models
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DOI：
10.1016/j.ces.2018.02.032
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发表时间：
2018-06
影响因子：
4.7
通讯作者：
Schalk Cloete;J. Cloete;S. Amini
中科院分区：
文献类型：
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作者：
Schalk Cloete;J. Cloete;S. Amini
这项工作提出了一个新的过滤两个流体模型关闭相间动量交换和中尺度固体应力的验证研究。在很宽的流化速度范围内实现了良好的定量比较实验数据。新的模型也表现出良好的网格独立性的行为相比，两个基准模型从文献。这些令人鼓舞的结果，在现实的三维流动实现，即使模型是从二维解析模拟。与从3D模拟导出的基准模型的比较表明，从在大的2D域中进行的解析模拟导出过滤模型可能比从在小的3D域中进行的解析模拟导出过滤模型更准确。此外，在这项工作中验证的新模型可以在壁占主导地位的流动，而无需使用专门的壁修正取得良好的结果。因此，进一步的工作，建议在更多的流动情况下测试这些新的过滤模型，并进一步评估过滤模型的能力，在二维预测真实的三维流动。
This work presents a validation study of new filtered Two Fluid Model closures for interphase momentum exchange and mesoscale solids stresses. Good quantitative comparisons to experimental data were achieved over a wide range of fluidization velocities. The new models also showed good grid independence behaviour compared to two benchmark models from literature. These encouraging results in realistic 3D flows were achieved even though the models were derived from 2D resolved simulations. Comparisons to a benchmark model derived from 3D simulations suggests that it may be more accurate to derive filtered models from resolved simulations conducted in a large 2D domain than from resolved simulations in a small 3D domain. Furthermore, the new model validated in this work could achieve good results in wall-dominated flows without the use of specialized wall corrections. Further work is therefore recommended to test these new filtered models in more flow situations and to further assess the ability of filtered models derived in 2D to predict real 3D flows.