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Comparison between two different mesh descriptions used for simulation of sieving processes

机译：用于筛分过程模拟的两种不同网格描述之间的比较

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摘要

Particle screening is an essential technology in many industrial fields. Related studies are often based on numerical simulations. This paper presents two different approaches for the mesh description used in the simulation of a particle screening process. The particular problem of interest is the separation of round shape particles of different sizes using a tumbling vertical cylinder while the particulate material is continuously fed into its interior. The first mesh model considers a probabilistic approach while the second model deals with the mesh in a very detailed way and considers the contact with individual wires that build up the mesh. The first model has the advantage that it is much simpler. In an attempt to better understand the mechanism of the particle transport between the different layers of the screening system, computational studies for different mesh probability factors have been performed. The results show that the two models have the same trend of results, but no complete agreement is achieved. Although the second model is much more sophisticated and computationally more expensive, the agreement between the two models can be improved by adjusting the probability factor in the first model.
机译：颗粒筛分是许多工业领域中必不可少的技术。相关研究通常基于数值模拟。本文提出了两种不同的网格描述方法，这些方法用于模拟粒子筛选过程。感兴趣的特定问题是在将颗粒材料连续喂入其内部的同时，使用翻滚的垂直圆柱体分离不同大小的圆形颗粒。第一个网格模型考虑概率方法，而第二个模型以非常详细的方式处理网格，并考虑与构成网格的各个导线的接触。第一个模型的优点是它简单得多。为了更好地理解筛选系统不同层之间的颗粒传输机制，已对不同的网格概率因子进行了计算研究。结果表明，两种模型的结果趋势相同，但未达成完全一致。尽管第二个模型要复杂得多并且计算上也要昂贵得多，但是可以通过调整第一个模型中的概率因子来改善两个模型之间的一致性。

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  • 来源
    《Granular matter》 |2008年第3期|p.223-229|共7页
  • 作者

    Hashem Alkhaldi; Christian Ergenzinger; Florian Fleissner; Peter Eberhard;

  • 作者单位

    Institute of Engineering and Computational Mechanics, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany;

    rnInstitute of Engineering and Computational Mechanics, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany;

    rnInstitute of Engineering and Computational Mechanics, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany;

    rnInstitute of Engineering and Computational Mechanics, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    discrete element method; particle screening; granular material; mesh description; tumbling screening machine;

    机译：离散元法颗粒筛选颗粒状材料网格描述;翻滚筛分机;

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