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首页> 外文期刊>Building and Environment >Numerical investigation of dust sedimentation effects on wall adsorption of indoor SVOC by the immersed boundary-lattice Boltzmann method
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Numerical investigation of dust sedimentation effects on wall adsorption of indoor SVOC by the immersed boundary-lattice Boltzmann method

机译：浸没边界晶格玻璃法测定室内SVOC壁吸附的灰尘沉积效应的数值研究

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摘要

In this work the lattice Boltzmann method (LBM) is used to investigate semi-volatile organic compounds (SVOCs) mass transfer under the influence of particle sedimentation in the boundary-layer scale region. For the fluid-particle interaction, the direct-forcing immersed boundary (IB) method is applied to calculate the hydrodynamic force. A mass-transfer IB method is employed to calculate the fluid-particle SVOC flux. Particles with zero and saturated initial-concentrations are studied to investigate the effects of clean and polluted particles. Effects of fluid/particle equilibrium coefficients, as well as particle diameters, are discussed. Wall adsorptions under the influence of multiple particles are also investigated. Numerical simulations reveal that a particle always intensifies wall adsorption independent of its initial SVOC concentration. The influences of particles on wall adsorption are associated with disturbance effect (disturbing air due to particle moving) and medium effect (SVOC mass transfer between particles and their surrounding air). Disturbance effect of clean particles overwhelms their medium effect while medium effect is dominant for saturated particles. Disturbance effect and medium effect both increase with particle diameter, and medium effect is more sensitive to particle diameter. Competitive adsorption occurs in presence of a number of particles and has an indirect impact on wall adsorption.
机译：在这项工作中，晶格Boltzmann方法（LBM）用于研究边界层刻度区域中颗粒沉降的影响下的半挥发性有机化合物（SVOCs）质量传递。对于流体颗粒相互作用，施加直接迫使浸没边界（IB）方法来计算流体动力学力。采用质量转移IB方法来计算流体颗粒SVOC通量。研究了具有零和饱和初始浓度的颗粒，以研究清洁和污染的颗粒的影响。讨论了流体/颗粒平衡系数的影响以及粒径。还研究了多种颗粒的影响下的壁吸附。数值模拟表明，颗粒始终与其初始SVOC浓度无关的壁吸附。颗粒对壁吸附的影响与扰动效果（由于颗粒移动而导致的空气）和中等效果（颗粒和周围空气之间的SVOC质量转移）有关。干净颗粒的干扰效果压倒了它们的中等效果，而中等效果是饱和颗粒的显性。扰动效果和中等效果均随粒径的增加，中等效果对粒径更敏感。在许多颗粒存在下发生竞争性吸附，对壁吸附具有间接影响。

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  • 来源
    《Building and Environment》 |2020年第8期|106974.1-106974.14|共14页
  • 作者

    Mao Yun-Feng; Li Zhuo; He Ya-Ling; Tao Wen-Quan;

  • 作者单位

    Tongji Univ Coll Environm Sci & Engn State Key Lab Pollut Control & Resources Reuse Shanghai 200092 Peoples R China|Shanghai Inst Pollut Control & Ecol Secur Shanghai Peoples R China;

    Tongji Univ Coll Environm Sci & Engn State Key Lab Pollut Control & Resources Reuse Shanghai 200092 Peoples R China|Shanghai Inst Pollut Control & Ecol Secur Shanghai Peoples R China;

    Xi An Jiao Tong Univ Sch Energy & Power Engn Key Lab Thermofluid Sci & Engn MOE Xian 710049 Shaanxi Peoples R China;

    Tongji Univ Coll Environm Sci & Engn State Key Lab Pollut Control & Resources Reuse Shanghai 200092 Peoples R China|Shanghai Inst Pollut Control & Ecol Secur Shanghai Peoples R China|Xi An Jiao Tong Univ Sch Energy & Power Engn Key Lab Thermofluid Sci & Engn MOE Xian 710049 Shaanxi Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Semi-volatile organic compounds (SVOCs); Dust sedimentation; Wall adsorption; Lattice Boltzmann method; Immersed boundary method;

    机译：半挥发性有机化合物（SVOC）;灰尘沉降;壁吸附;格子Boltzmann方法;浸没边界法;

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