报告题目：Numerical modelling of packing and compaction of cohesive particles
报告人：Dr. / Senior Lecturer Runyu Yang，School of Materials Science and Engineering, University of New South Wales (UNSW), Australia
时间：2010年12月28日上午10:00 ~ 11:30
地点：曹光彪大楼326室
杨润宇博士简介：
杨润宇博士1987年进入浙江大学材料系学习，1994年浙江大学材料系硕士毕业。2003年获UNSW博士学位，2003-2005年期间做ARC-CSIRO博士后，2005年起受聘在UNSW材料学院工作。研究兴趣主要集中在粒状物料与流体介质相互作用的数值模拟，先后在Physical Review Letters/E, J. Applied Physics, EPL, J. Colloid and Interface Science, AIChE J. 等期刊上发表50余篇论文。
Numerical modelling of packing and compaction of cohesive particles
Abstract: Particle packing and compaction have been subjects for long time because of their importance to scientific research and industrial applications. Cohesion is often involved in many occasions, which arises from the interparticle attractive van der Waals forces associated with fine particles and/or the presence of liquid bridges among particles. Consequently, packing and compaction behaviours of cohesive particles differ from that of coarse particles, which can be highlighted by the variation of packing structure with particle size and liquid content. Using numerical modelling based on the discrete element method (DEM), packing structure of cohesive (fine or wet) particles has been characterised in terms of porosity, coordination number and radial distribution function, and the effect of particle material properties on the packing structure has been investigated. Particle-particle and pore-pore connection were also analysed using Voronoi and Delaunay tessellation, which would be useful to understand the conductivity and transport properties of packing of cohesive particles. Finally, the force structures was characterised in terms of force distribution and its relationship with jamming states was discussed. By combining all simulation results, we have proposed a general equation to link the cohesive force with the packing density.
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2010年12月27日
