Basal effect in mono- and bi-disperse chute flows

Lu Jing, Fiona C.Y. Kwok, Yat Fai Leung, Yuri D. Sobral

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


The basal condition for granular chute flows is assumed rough and non-slip in experimental and numerical studies. In mono-disperse flows, a rough base is usually constructed by gluing/fixing a layer of particles that is similar or identical to the flowing particles. However, the base condition is not so clear in bi-disperse flows, where size segregation changes the relative basal roughness. In this paper, basal effect is studied in both mono- and bi-disperse chute flows. Different size ratios are adopted to understand how size segregation affects the basal condition and velocity profile in the steady, fully developed state. It is found that considerable sliding may arise as large particles stay in contact with the base, and it may affect the development of segregation. The velocity profile at the steady state is different due to the occurrence of segregation. In addition, sensitivity analyses show that the basal effect is independent of the sample size and contact parameters.
Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Discrete Element Methods
PublisherSpringer Science and Business Media, LLC
Number of pages8
ISBN (Print)9789811019258
Publication statusPublished - 1 Jan 2017
Event7th International Conference on Discrete Element Methods, DEM7 2016 - Dalian, China
Duration: 1 Aug 20164 Aug 2016


Conference7th International Conference on Discrete Element Methods, DEM7 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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