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Rolling and sliding in 3-D discrete element models

journal contribution
posted on 06.12.2017, 00:00 by Yu WangYu Wang, F Alonso-Marroquin, Wanwu GuoWanwu Guo, Yucang WangYucang Wang
Rolling and sliding play fundamental roles in the deformation of granular materials. In simulations of granular flow using the discrete element method (DEM), the effect of rolling resistance at contacts should be taken into account. However, even for the simplest case involving spherical particles, there is no agreement on what is the best way to define rolling and sliding; various versions of definitions and calculations of rolling and sliding were proposed. Some even suggest that a unique definition for rolling and sliding is not possible. We re-check previous studies on rolling and sliding in DEMs and find that some researchers made a conceptual mistake when dealing with pure sliding between particles of different sizes. After considering the particle radius in the derivation of rolling velocity, the results yield a unique solution. Starting with clear and unique definitions of pure rolling and sliding, we present the detailed derivation and validate our results by checking two special cases of rolling. The decomposition of the relative motion is objective; that is, independent of the reference frame in which the relative motion is measured. © 2015 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.

History

Volume

23

Start Page

49

End Page

55

Number of Pages

7

eISSN

2210-4291

ISSN

1674-2001

Location

Netherlands

Publisher

Elsevier

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

School of Engineering and Technology (2013- ); TBA Research Institute; University of Sydney;

Era Eligible

Yes

Journal

Particuology.

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