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三维矩形槽道中颗粒沉降的数值模拟

刘马林

刘马林. 三维矩形槽道中颗粒沉降的数值模拟[J]. 应用数学和力学, 2011, 32(9): 1071-1083. doi: 10.3879/j.issn.1000-0887.2011.09.006
引用本文: 刘马林. 三维矩形槽道中颗粒沉降的数值模拟[J]. 应用数学和力学, 2011, 32(9): 1071-1083. doi: 10.3879/j.issn.1000-0887.2011.09.006
LIU Ma-lin. Numerical Simulation of Particle Sedimentation in a 3D Rectangular Channel[J]. Applied Mathematics and Mechanics, 2011, 32(9): 1071-1083. doi: 10.3879/j.issn.1000-0887.2011.09.006
Citation: LIU Ma-lin. Numerical Simulation of Particle Sedimentation in a 3D Rectangular Channel[J]. Applied Mathematics and Mechanics, 2011, 32(9): 1071-1083. doi: 10.3879/j.issn.1000-0887.2011.09.006

三维矩形槽道中颗粒沉降的数值模拟

doi: 10.3879/j.issn.1000-0887.2011.09.006
基金项目: 国家科技重大专项基金资助项目(ZX06901)
详细信息
    作者简介:

    刘马林(1983- ),男,安徽人,助理研究员,博士(Tel:+86-10-89796092;E-mail:liumalin@tsinghua.edu.cn).

  • 中图分类号: O311.2; O313.7

Numerical Simulation of Particle Sedimentation in a 3D Rectangular Channel

  • 摘要: 采用三维格子Boltzmann方法对矩形通道中的颗粒沉降进行了模拟研究.单颗粒沉降的模拟结果表明,颗粒最终的稳定沉降位置沿槽道中心线,不受颗粒初始位置和直径的影响.颗粒和壁面之间的两体相互效应可以用无因次沉降速度定量描述,无因次沉降速度的模拟结果和实验结果定量上吻合一致.模拟分析了双颗粒沉降的DKT(drafting, kissing and tumbling)过程,探讨了颗粒直径比以及壁面效应对DKT过程的影响.模拟发现当颗粒直径相同时,双颗粒的沉降过程为周期性的DKT过程,从而形成双螺旋形式的沉降轨迹,此螺旋沉降轨迹的频率和振幅受颗粒初始位置影响.从模拟结果中还得到颗粒群的最终稳定构型,并进行了构型对比分析.最后对包含49个颗粒的颗粒群沉降行为进行了模拟,说明多体相互作用在对称性的情况下可以简化.
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出版历程
  • 收稿日期:  2010-11-24
  • 修回日期:  2011-06-14
  • 刊出日期:  2011-09-15

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