Revisiting rolling and sliding in two-dimensional discrete element models

查看全文 作　　者：Yucang [1,2]Wang;Fernando Alonso-[3]Marroquin;Sheng [2]Xue;Jun [2]Xie

机构地区：[1]School of Engineering and Technology.Central Queensland University;[2]Earth Science and Resource Engineering,The Commonwealth Scientific and Industrial Research Organisation(CSIRO);[3]School of Civil Engineering,The University of Sydney

出　　处：《Particuology》索引2015年第13卷第1期,共7页

基　　金：Huainan Coal Mining Group in China;CSIRO in Australia for their financial support of this study;the support of the CERDS funding scheme 摘　　要：It has long been recognized that the rotation of single particles plays a very important role in simulations of granular flow using the discrete element method(DEM).Many researchers have also pointed out that the effect of rolling resistance at the contact points should be taken into account in DEM simulations.However,even for the simplest case involving two-dimensional circular particles,there is no agreement on the best way to define rolling and sliding,and different definitions and calculations of rolling and sliding have been proposed.It has even been suggested that a unique rolling and sliding definition is not possible.In this paper we assess results from previous studies on rolling and sliding in discrete element models and find that some researchers have overlooked the effect of particles of different sizes.After considering the particle radius in the derivation of rolling velocity,all results reach the same outcome:a unique solution.We also present a clear and simple derivation and validate our result using cases of rolling.Such a decomposition of relative motion is objective,or independent of the reference frame in which the relative motion is measured. 关键词：离散单元法元件模型滑动滚动阻力轧制单个颗粒相对运动圆形颗粒

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Revisiting rolling and sliding in two-dimensional discrete element models

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