关于举办澳大利亚蒙纳士大学周宗彦博士学术讲座的通知
发布时间: 2019-03-14

  目:Packing and flow behavior of ellipsoidal particles in particulate systems(椭球颗粒系统的堆积和流动行为的研究)

  间:2019318(星期一)10001100

  点:交通大楼6604会议室

报告人:周宗彦博士(蒙纳士大学)

欢迎广大师生参加

                      土木与交通学院

                       2019314

 

报告人简介

周宗彦博士,东北大学工程学士(1996)和硕士(2000),新南威尔士大学博士(2007),目前任职于澳大利亚蒙纳士大学化工学院,高级讲师,终身职位。周博士长期从事于粉体系统、粉体-流体多相流动系统和传热传质的基础研究,以及各种工业过程的应用研究,取得了同行公认的突出学术成绩;特别是在阐明多相流动体系模拟理论和建立数值实验优化方法等基础科学问题上取得显著学术突破,受到国内外同行的认可和高度评价。近年来,出色地主持或参与了两项国家重大和重点项目,10余项澳大利亚科研基金,累计科研经费超过1千万元。申请人已发表100余篇国际期刊和会议论文,其中70篇在国际知名刊物发表并被SCI 收录并被国内外同行大量引用 (他引3000多次); 多次受邀特邀报告或大会报告,担任重要学术会议秘书、技术委员会委员、以及分会主席等,受邀担任澳大利亚科研项目评审和十几种国际权威学术刊物评阅专家。曾是澳大利亚科研委研究员(2007-2010),目前担任澳大利亚科研委颗粒计算中心副主任(2016-2021),同时是江苏省产业技术研究院过程模拟仿真研究所核心成员。

报告摘要:

       Particle shape is one of the most important properties of particles, and it affects the packing and flow structures that are critical to transport properties such as permeability related to pore connection and thermal conductivity related to particle connection. Particle shape can be regular or irregular. To be more quantitative, recent studies are focused on particles of well-defined shapes. In particular, ellipsoids attract a lot of attention in recent years as it can represent a large number of shapes, e.g. from platy to elongated. In this presentation, I give a brief review of studies of ellipsoidal particles on the basis of discrete element method, and examine the effects of particle shapes in some typical particulate systems, including: (1) particle packing, focusing on how aspect ratio affects packing density and structure for coarse and fine ellipsoids; (2) hopper flow, demonstrating the dependence of discharging rate of hopper flow on particle shapes; (3) sandpile formation, focusing on how aspect ratio affects the angle of repose and stress dip distribution; and (4) fluidization, illustrating how particle shape affects the bed permeability, orientation, and bed flow/force structures. The results show that discrete element method for ellipsoids provides a useful approach to investigate shape effect on the behavior of granular materials