Comptes Rendus
no. 3
DEM simulations of bi-disperse ellipsoids of different particle sizes
Tang-Tat Ng1, 2  ; Wei Zhou1
1 State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
2 Civil Engineering Department, University of New Mexico, NM 87131, USA
Comptes Rendus. Mécanique, Volume 342 (2014) no. 3, pp. 141-150.

This paper presents the result of two schemes concerning computational effort reduction in discrete element simulations (DEM) of binary mixtures. Numerical triaxial compression simulations were performed. The coarse ellipsoids and the fine ellipsoids have similar shapes, but the sizes are significantly different. Computational effort reduction can be achieved by increasing the density of individual particles so that a greater time step can be used in DEM. Two different mass increase schemes are investigated. The result indicates that both schemes provide a speedup. Similar results can be produced with the correct damping.

Publié le :
DOI : 10.1016/j.crme.2014.01.008
Mots clés : DEM, Granular materials
Tang-Tat Ng 1, 2 ; Wei Zhou 1

1 State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
2 Civil Engineering Department, University of New Mexico, NM 87131, USA 
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Tang-Tat Ng; Wei Zhou. DEM simulations of bi-disperse ellipsoids of different particle sizes. Comptes Rendus. Mécanique, Volume 342 (2014) no. 3, pp. 141-150. doi : 10.1016/j.crme.2014.01.008. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2014.01.008/

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[4] H. Mio; A. Shimosaka; Y. Shirakawa; J. Hidaka Optimum cell size for contact detection in the algorithm of the discrete element method, J. Chem. Eng. Jpn., Volume 38 (2005) no. 12, pp. 969-975

[5] T.-T. Ng Input parameters of discrete element method, J. Eng. Mech., Volume 132 (2006) no. 7, pp. 723-729

[6] X. Lin; T.-T. Ng A three-dimensional element model using arrays of ellipsoids, Geotechnique, Volume 47 (1997) no. 2, pp. 319-329

[7] T.-T. Ng Hydrostatic boundaries in discrete element methods, Discrete Element Methods: Numerical Modeling of Discontinua, Geotechnical Special Publication, vol. 117, ASCE, 2002, pp. 47-51

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