Granular Matter

, 18:1 | Cite as

Numerical and experimental verification of a damping model used in DEM

  • Wei Zhou
  • Xing Ma
  • Tang-Tat Ng
  • Gang Ma
  • Shao-Lin Li
Original Paper

Abstract

This paper presents a study on the damping ratio \(({\upbeta })\) used in discrete element simulations. Physical experiments are performed by dropping particles from a predetermined height. Two kinds of granular particles, aluminum and steel spheres, are used. The size of these particles are the same. The process of particle depositing under gravity is simulated using the discrete element method. The experimental observation is compared with the numerical result to identify the appropriate \({\upbeta }\). The result indicates that the appropriate damping ratio used in discrete element simulations is between 0.2 and 0.3 %. Various \({\upbeta }\) are then used in the numerical simulations to study the effect of \({\upbeta }\) on the dropping process. The final height of the sample relates to \({\upbeta }\) and the drop height. The effect of \({\upbeta }\) is more profound for small drop height. For greater drop height, the effect of \({\upbeta }\) is negligible.

Keywords

Granular materials Discrete element method (DEM) Damping 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Wei Zhou
    • 1
  • Xing Ma
    • 1
  • Tang-Tat Ng
    • 2
  • Gang Ma
    • 1
  • Shao-Lin Li
    • 1
  1. 1.State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhanChina
  2. 2.Civil Engineering DepartmentUniversity of New MexicoAlbuquerqueUSA

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