Sedimentation of short cylindrical pollutants with mechanical contacts
  • 【DOI】

    10.3321/j.issn:1001-0742.2005.06.005

  • 【摘要】

    Lattice Boltzmann method and elastic particle collision model were used to investigate the sedimentation of short cylindrical pollutant particles with mechanical contacts for varying bulk number densi... 展开>>Lattice Boltzmann method and elastic particle collision model were used to investigate the sedimentation of short cylindrical pollutant particles with mechanical contacts for varying bulk number density ε and terminal Reynolds number ReT. The corresponding experiments were performed as a comparison. The clusters of pollutant particles with an inverted "T" structure were observed, the pollutant particles for high ε and large ReT scattered wider than that for low ε and small ReT. The sedimentation velocities increased suddenly at the initial stage, then decreased drastically, after that swayed around and approached to a steady value. The time to steady state did not depend on ε and ReT. The effect of particle interactions was to hinder the average sedimentation velocity, and hindrance was directly proportional to ε. The orientation distributions of pollutant particles depended on ReT and ε, especially on the former. Both the standard deviations of vertical and horizontal velocity, the former was larger than the latter, were nearly independent on ε and ReT. 收起<<

  • 【作者】

  • 【作者单位】

    Department of Mechanics/Institute of Marine and Coastal Sciences

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2005年6期

  • 【关键词】

    cylindrical pollutant particles  sedimentation  lattice-Boltzmann simulation  experiment  mechanical contact 

  • 【基金项目】

    国家自然科学基金 中国高等教育博士点基金