Abstract A promising workflow for computational generation and meshing of resolved-particle randomly packed beds of arbitrary-shaped particles is described. The workflow is based on an automated package that is developed for the Bullet Physics Library for packed bed generation, and on the shrink-wrap method for handling the meshing challenges of the particle contact areas. Packed bed properties such as radial voidage and particle angle distributions are validated against existing experimental data and theoretical methods in the literature. Furthermore, the accuracy of the generated mesh using the shrink-wrap technique is evaluated by calculating the bulk and radial voidage distribution, the pressure drop, and by velocity profile and heat transfer analysis using computational fluid dynamics (CFD) simulations. It is shown that the proposed workflow can speed up the process of the geometry and mesh generation while it maintains the structural features of the bed. Finally, applications of such geometries to fixed bed reaction engineering problems are presented to illustrate simulations that can be achieved using the new workflow.

中文翻译：

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具有复杂颗粒形状的解析颗粒填充床模型的集成工作流程

摘要描述了一种用于计算生成和网格划​​分任意形状粒子的解析粒子随机堆积床的有前途的工作流程。该工作流程基于为 Bullet Physics Library 开发的用于填充床生成的自动化软件包，以及用于处理粒子接触区域网格划分挑战的收缩包装方法。填充床特性，例如径向空隙率和颗粒角度分布，已根据现有的实验数据和文献中的理论方法进行验证。此外，使用收缩包裹技术生成的网格的准确性是通过计算体积和径向空隙分布、压降以及使用计算流体动力学 (CFD) 模拟的速度分布和传热分析来评估的。结果表明，所提出的工作流程可以加快几何和网格生成的过程，同时保持床的结构特征。最后，介绍了这种几何形状在固定床反应工程问题中的应用，以说明使用新工作流程可以实现的模拟。