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Scalings of axisymmetric granular column collapse

机译：轴对称颗粒柱塌缩的标度

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摘要

Experimental investigations into the collapse of granular columns are presented with dimensional results of the final deposit obtained using a 3D laser scanner. The high accuracy measurement method has found that the final pile radius is not only dependent on the aspect ratio of the initial geometry as previously thought, but also the initial column radius and hence the ratio of column radius to particle diameter. This was also observed to be true for the angle at the base of the deposit. Theoretical considerations coupled with obtained data have allowed the angle at summit for aspect ratios less than approximately 3 to be described entirely in terms of material parameters and aspect ratio-something desired for all length scalings but seemingly unobtainable due to the dynamic nature of the collapse. With the method being non intrusive, measurement of the summital radius was also made possible. The final height showed a dependence predominantly with aspect ratio in agreement with previous authors.
机译：利用3D激光扫描仪获得的最终沉积物的尺寸结果显示了对粒状柱塌陷的实验研究。高精度测量方法已经发现，最终的桩半径不仅取决于先前认为的初始几何形状的长宽比，而且还取决于初始柱半径，因此也取决于柱半径与粒径的比率。对于沉积物底部的角度也是如此。理论上的考虑与获得的数据相结合，使得纵横比小于约3的峰顶角度可以完全用材料参数和纵横比来描述，这对于所有长度缩放来说都是理想的，但由于塌陷的动态性质，似乎无法获得。由于该方法是非侵入性的，因此也可以测量顶峰半径。最终的高度显示出主要依赖长宽比，与先前的作者一致。

著录项

  • 来源
    《Granular matter》 |2014年第1期|115-124|共10页
  • 作者

    J. M. Warnett; P. Denissenko; P. J. Thomas; E. Kiraci; M. A. Williams;

  • 作者单位

    School of Engineering, University of Warwick, Gibbet Hill Road,Coventry CV4 7AL, UK;

    School of Engineering, University of Warwick, Gibbet Hill Road,Coventry CV4 7AL, UK;

    School of Engineering, University of Warwick, Gibbet Hill Road,Coventry CV4 7AL, UK;

    Warwick Manufacturing Group, University of Warwick,Gibbet Hill Road, Coventry CV4 7AL, UK;

    Warwick Manufacturing Group, University of Warwick,Gibbet Hill Road, Coventry CV4 7AL, UK;

  • 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

    Granular collapse; Granular flow; Failure surface; Avalanches;

    机译：颗粒塌陷;颗粒流破坏面;雪崩;

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