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Effect of particle shape on domino wave propagation: a perspective from 3D, anisotropic discrete element simulations

机译：粒子形状对多米诺波传播的影响：3D，各向异性离散元素模拟的视角

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摘要

A fundamental understanding of the underlying physics of granular systems is not only of academic interest, but is also relevant for industrial applications. One specific aspect that is currently only poorly understood is the effect of particle shape on the dynamics of such systems. In this work the effect of particle shape on domino wave propagation was studied using 3D, anisotropic discrete element simulations. The dominoes were modelled using the three-dimensional super-quadric equation and very good agreement between the intrinsic collision speeds predicted by the simulations and the corresponding experimental data was observed. Furthermore, the influence of particle blockiness on the collision dynamics of dominoes was investigated numerically using particle shapes ranging from ellipsoids to almost cuboid particles. It was found that the intrinsic collision speed increased with increasing particle blockiness. It was also shown that a higher initial contact point favours the transmission of kinetic energy in the direction of the wave propagation, leading to a higher intrinsic collision speed for dominoes of higher blockiness.
机译：对粒度系统的基本物理原理的基本理解不仅具有学术意义，而且与工业应用相关。当前仅鲜为人知的一个特定方面是颗粒形状对此类系统动力学的影响。在这项工作中，使用3D各向异性离散元模拟研究了颗粒形状对多米诺骨波传播的影响。使用三维超二次方程对多米诺骨牌进行建模，并通过模拟预测的内在碰撞速度与相应的实验数据之间具有很好的一致性。此外，使用从椭圆形到几乎长方体的颗粒形状，对颗粒阻塞性对多米诺骨牌碰撞动力学的影响进行了数值研究。发现本征碰撞速度随着颗粒块度的增加而增加。还表明，较高的初始接触点有利于在波传播方向上传递动能，从而导致具有较高嵌段性的多米诺骨牌具有较高的固有碰撞速度。

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  • 来源
    《Granular matter》 |2014年第1期|107-114|共8页
  • 作者

    G. Lu; J. R. Third; C. R. Mueller;

  • 作者单位

    Laboratory of Energy Science and Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 27, 8092 Zurich, Switzerland;

    Laboratory of Energy Science and Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 27, 8092 Zurich, Switzerland;

    Laboratory of Energy Science and Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 27, 8092 Zurich, Switzerland;

  • 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 model; Anisotropic particles; Granular material; Contact mechanics; Propagating wave;

    机译：离散元模型;各向异性颗粒;粒状材料;接触力学;传播波;

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