Numerical simulation of industrial die filling using the discrete element method
Numerical simulation of industrial die filling using the discrete element method
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DOI：
10.1016/j.ces.2015.09.014
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发表时间：
2015-12-22
影响因子：
4.7
通讯作者：
Sakai, Mikio
中科院分区：
文献类型：
--
作者：
Tsunazawa, Yuki;Shigeto, Yusuke;Sakai, Mikio
模具填充是化工粉末成型的一个重要方面。离散元法（DEM）已被应用于模拟的模具填充系统的文献。在这些模拟中，模具已被建模为简单的形状，如圆柱体和长方体。然而，工业需要在计算中对复杂的模具形状进行建模。此外，从工业应用的角度来看，现有的DEM是有问题的，因为复杂形状的模具可能无法通过现有技术建模。针对这一问题，将符号距离函数（SDF）模型应用于离散元法（DEM/SDF），并对任意形状的模具进行了DEM/SDF方法的验证。针对宏观粉末流动，将模拟结果与实验结果进行了比较，并对速度的空间分布、鞋形件的投影面积和填充颗粒的最终质量进行了验证。因此，DEM/SDF模型的适当性在模具填充系统中得到了新的证明;即，DEM/SDF方法是一种有效的数值模拟颗粒在任意形状口模中流动的方法。(C)2015爱思唯尔有限公司版权所有。
Die filling is an important aspect of powder molding in chemical engineering. The discrete element method (DEM) has been applied to simulations of die filling systems in the literature. In these simulations, the die has been modeled by simple shapes such as cylinders and cuboids. However, industries require modeling of complex die shapes in the computations. In addition, the existing DEM is problematic from the viewpoint of industrial applications, since complexly shaped dies might not be modeled by existing technologies. To solve this problem, the signed distance function (SDF) model is applied to the DEM simulation (DEM/SDF) and the DEM/SDF approach is validated for arbitrarily shaped dies. Focusing on macroscopic powder flow, simulation results are compared with experimental results, and good agreement is confirmed for the spatial distribution of velocity, the projection areas of the shoe, and the final mass of filling particles. Therefore, the adequacy of the DEM/SDF model is newly demonstrated in the die filling system; i.e., the DEM/SDF method is shown to be an effective method for the numerical simulation of particle flow into arbitrarily shaped dies. (C) 2015 Elsevier Ltd. All rights reserved.