Vibration induced flow in hoppers:DEM 2D polygon model

查看全文 作　　者：Feras Y. [1]Fraige;Paul A. [2]Langston;Andrew J. [3]Matchett;John [4]Dodds

机构地区：[1]Faculty of Mining and Environmental Engineering,Al-Hussein Bin Talal University Jordan;[2]Chemical and Environmental Engineering, Nottingham University, University Park;[3]Chemical Engineering, University of Teesside;[4]Centre RAPSODEE, Ecole Des Mines

出　　处：《Particuology》索引2008年第6卷第6期,共12页

摘　　要：A two-dimensional discrete element model (DEM) simulation of cohesive polygonal particles has been developed to assess the benefit of point source vibration to induce flow in wedge-shaped hoppers. The particle-particle interaction model used is based on a multi-contact principle. The first part of the study investigated particle discharge under gravity without vibration to determine the critical orifice size (Bc) to just sustain flow as a function of particle shape. It is shown that polygonal-shaped particles need a larger orifice than circular particles. It is also shown that Bc decreases as the number of particle vertices increases. Addition of circular particles promotes flow of polygons in a linear manner. The second part of the study showed that vibration could enhance flow, effectively reducing Bc. The model demonstrated the importance of vibrator location (height), consistent with previous continuum model results, and vibration amplitude in enhancing flow. 关键词：动力效应模型固体振动仿真

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Vibration induced flow in hoppers:DEM 2D polygon model

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