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Comparison of different capillary bridge models for application in the discrete element method

机译:不同毛细管桥模型在离散元法中的应用比较

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摘要

Weakly wetted granular material is the subject of many studies. Several formulations were proposed to calculate the capillary forces between wet particles. In this paper some of such models have been implemented in a DEM-framework, and simulation results were compared to experimental measurements. Also, the influence of capillary model type on macro parameters like local shear viscosity and cohesive parameters of sheared material have been investigated through the simulation of spherical beads using a DEM-model of a split-bottom shear-cell. It was concluded that the water content, simulated with the help of capillary bridge models, changes the macro-properties of the simulated granular material. Different capillary bridge models do not influence the macroscopic results visibly.
机译:湿润的粒状材料是许多研究的主题。提出了几种公式来计算湿颗粒之间的毛细作用力。在本文中,一些这样的模型已在DEM框架中实现,并将仿真结果与实验测量结果进行了比较。此外,通过使用裂谷式剪切单元的DEM模型模拟球形珠,还研究了毛细管模型类型对宏观参数(如局部剪切粘度和剪切材料的内聚参数)的影响。结论是,借助于毛细管桥模型模拟的水含量改变了模拟颗粒材料的宏观性质。不同的毛细管桥模型不会明显影响宏观结果。

著录项

  • 来源
    《Granular matter》 |2014年第6期|911-920|共10页
  • 作者单位

    Institute of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Lampadiusstr. 4, 09596 Freiberg, Germany;

    Institute of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Lampadiusstr. 4, 09596 Freiberg, 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

    Granular material; DEM; Capillary bridge models; Liquid bridges;

    机译:粒状材料;DEM;毛细管桥模型;液桥;

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