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  • 主管单位:
  • 上海市教育委员会
  • 主办单位:
  • 上海理工大学
  • 主  编:
  • 庄松林
  • 地  址:
  • 上海市军工路516号
  • 邮政编码:
  • 200093
  • 联系电话:
  • 021-55277251
  • 电子邮件:
  • xbzrb@usst.edu.cn
  • 国际标准刊号:
  • 1007-6735
  • 国内统一刊号:
  • 31-1739/T
  • 邮发代号:
  • 4-401
  • 单  价:
  • 15.00
  • 定  价:
  • 90.00
郭宇,凡凤仙,白鹏博,刘举.颗粒物质在竖直振动U形管中迁移的离散元方法模拟[J].上海理工大学学报,2019,41(5):409-416.
颗粒物质在竖直振动U形管中迁移的离散元方法模拟
Discrete Element Method Simulation on the Immigration of Granular Matter in a Vertically Vibrating U-Tube
投稿时间:2018-11-05  
DOI:10.13255/j.cnki.jusst.2019.05.001
中文关键词:  颗粒物质  竖直振动  U形管  迁移  离散元方法
英文关键词:granular matter  vertical vibration  U-tube  immigration  discrete element method
基金项目:国家自然科学基金资助项目(51206113,51776129,51576130);上海市科委科研计划项目(13DZ2260900)
作者单位E-mail
郭宇 上海理工大学 能源与动力工程学院, 上海 200093  
凡凤仙 上海理工大学 能源与动力工程学院, 上海 200093 fanfengxian@usst.edu.cn 
白鹏博 上海理工大学 能源与动力工程学院, 上海 200093  
刘举 上海理工大学 能源与动力工程学院, 上海 200093  
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中文摘要:
      采用离散元方法对颗粒物质在竖直振动U形管中的迁移进行三维数值模拟。将数值模拟结果和实验进行对比,两者吻合良好。在此基础上,考察了摩擦对颗粒动力学行为的影响。结果表明,存在摩擦时,颗粒将发生迁移运动,使得U形管两分支内颗粒柱产生高度差,该过程伴随着颗粒对流现象;当颗粒与管壁间摩擦系数为0时,颗粒柱高度差在0附近波动,两分支内存在相似的颗粒对流;当颗粒与颗粒间摩擦系数为0时,颗粒柱高度差几乎保持为0,颗粒对流消失。研究还发现,存在摩擦时,U形管两分支内颗粒的竖直方向平均速度差异很大;当颗粒与管壁间或颗粒与颗粒间摩擦系数为0时,U形管两分支内颗粒的竖直方向平均速度存在一定的一致性。
英文摘要:
      Using the discrete element method (DEM), three-dimensional numerical simulations were performed to investigate the immigration of granular matter in a vertical vibrating U-tube. The numerical simulation results were compared with the experiment ones and good agreement was found. On this basis, the effects of friction on the dynamical behavior of granular matter were examined. The results show that with the presence of friction, the granular immigration occurs, causing a difference between the granular column heights in the two branches of the U-tube, and the granular immigration is accompanied by granular convective phenomenon. When the friction coefficient between the particle and the tube wall is 0, the granular column heights difference fluctuates around 0, and similar granular convective phenomena appear in the two branches. When the friction coefficient among particles is 0, the granular column heights difference almost keeps 0 and the granular convective phenomena disappear. It is also found that the vertical average particle velocities in the two branches of the U-tube differ largely when frictions exist. Moreover, there are some consistency in between the vertical average velocities of particles in the two branches of the U-tube when either the friction coefficient between particles and the tube wall or the friction coefficient among particles is 0.
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