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A drag force formula for heterogeneous granular flow systems based on finite average statistical method
Particuology ( IF 3.5 ) Pub Date : 2020-07-18 , DOI: 10.1016/j.partic.2020.06.004
Xin Li , Jie Ouyang , Xiaodong Wang , Panpan Chu

The existing drag models are mostly based on the assumption of homogenous fluidization. However, the use of a homogeneous drag model to predict a heterogeneous granular flow system will cause a deviation. In this study, we developed a drag force model based on the assumption of heterogeneous fluidization. To prevent weakening of the heterogeneous characteristics in the drag force formula, we propose a finite average statistical method to filter the information of the heterogeneous granular cluster. The filtered information was used to fit the modified drag formula, which can reflect the heterogeneity of the granular cluster considering different configurations. A comparison shows that the new proposed drag formula filtered by the finite average statistical method fits well with energy minimization multi-scale simulation results.



中文翻译:

基于有限平均统计方法的非均质颗粒流系统的阻力公式

现有的阻力模型主要基于均质流化的假设。但是,使用均质阻力模型预测异质颗粒流系统将导致偏差。在这项研究中,我们基于异质流化的假设开发了阻力模型。为了防止拖曳力公式中的异质性特征减弱,我们提出了一种有限平均统计方法来过滤异质粒状簇的信息。过滤后的信息用于拟合修改后的阻力公式,该公式可以反映考虑不同配置的粒状簇的异质性。比较表明,新提出的用有限平均统计方法过滤的阻力公式与能量最小化多尺度仿真结果非常吻合。

更新日期:2020-07-18
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