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The influence of end walls on the segregation pattern in a horizontal rotating drum

机译:端壁对水平旋转滚筒中偏析图案的影响

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摘要

The influence of end walls on segregation of bidisperse granular beds in a short rotating horizontal drum is studied by a discrete element method. Whereas non-closed periodically continued drums segregate radially, all simulations of drums with end walls resulted in axial segregation with two bands at low friction between the particles and the end-wall, and three bands at high friction. Various simulations show irregular transitions between two approximately equally stable states, with rapid oscillations preceding the conversions. The formation of two axial bands decreases the energy dissipation by the bed, whereas neither radial segregation nor axial segregation into three bands reduced the power absorption at constant angular velocity. Roughening up the end-walls also increased the rate of axial segregation.
机译:通过离散元方法研究了端壁对短旋转卧式转鼓中双分散颗粒床偏析的影响。非封闭的周期性连续的鼓径向分离,而所有带有端壁的鼓的模拟都导致轴向分离,其中两个带在颗粒和端壁之间的摩擦较小,而三个在高摩擦带。各种模拟显示了两个近似相等的稳定状态之间的不规则过渡,在转换之前会出现快速振荡。两个轴向带的形成减少了床层的能量耗散,而径向偏析或轴向偏向三个带均未减小恒定角速度下的功率吸收。粗化端壁也增加了轴向偏析的速度。

著录项

  • 来源
    《Granular matter》 |2013年第1期|25-38|共14页
  • 作者单位

    Food Process Engineering, Wageningen University, P. O. Box 8129, 6700 EV Wageningen, The Netherlands;

    Computational BioPhysics, MESA+ Institute for Nanotechnology and Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands,Multi Scale Mechanics, MESA+ Institute for Nanotechnology and Faculty of Engineering Technology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands;

    Bioprocess Engineering, Wageningen University, P. O. Box 8129, 6700 EV Wageningen, The Netherlands;

    Food Process Engineering, Wageningen University, P. O. Box 8129, 6700 EV Wageningen, The Netherlands;

    Computational BioPhysics, MESA+ Institute for Nanotechnology and Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands;

  • 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

    axial segregation; end walls; end caps; oscillations; drum;

    机译:轴向偏析端壁;端盖;振荡;鼓;

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