CFD-DEM investigation of particle elutriation with electrostatic effects in gas-solid fluidized beds
CFD-DEM investigation of particle elutriation with electrostatic effects in gas-solid fluidized beds
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气固流化床中静电效应颗粒淘洗的 CFD-DEM 研究
DOI：
10.1016/j.powtec.2016.12.032
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发表时间：
2017-02
影响因子：
5.2
通讯作者：
Su Hongye
中科院分区：
文献类型：
--
作者：
Yang Yao;Zi Can;Huang Zhengliang;Wang Jingdai;Lungu Musango;Liao Zuwei;Yang Yongrong;Su Hongye
对沸腾床中颗粒淋洗的预测不成功的部分原因是忽略了静电效应。此外，由于缺乏适当设计的实验，很难量化静电对粒子淘洗的影响。本文首次采用CFD-DEM模拟方法研究了考虑静电影响的二维沸腾床中颗粒的淋洗过程。模型预测表明，在相对较高的电荷水平下，颗粒上的静电电荷抑制了颗粒的淋洗，甚至完全消除了颗粒的淋洗。研究进一步表明，静电作用会导致自由板内小颗粒的床层高度和轴向速度增加，最终促进颗粒的淋洗。然而，静电吸引引起的团聚占主导地位，因此自由板中小颗粒浓度的降低抑制了颗粒的淋洗。
Unsuccessful prediction of particle elutriation in fluidized beds is in part due to the negligence of electrostatic effects. In addition, lack of properly designed experiments makes it difficult to quantify the effects of electrostatics on particle elutriation. In this work, the CFD-DEM modeling approach has been used for the first time to investigate particle elutriation in a 2D fluidized bed taking into account electrostatic effects. Model predictions show that electrostatic charges on particles suppress particle elutriation and even eliminate elutriation completely at relatively higher charge levels. The study further shows that electrostatic effects result in the increase of the fluidized bed height and axial velocity of small particles in the free board which ultimately promotes particle elutriation. However, the presence of agglomerates caused by electrostatic attractions is dominant, thus the decrease in the concentration of small particles in the free board suppresses particle elutriation.
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影响因子：
5.2
作者：
M. Hassani;R. Zarghami;H. Norouzi;N. Mostoufi
通讯作者：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1016/j.ijmultiphaseflow.2010.12.007
发表时间：
2011-06
影响因子：
3.8
作者：
J. van Ommen;S. Sasic;John van der Schaaf;S. Gheorghiu;F. Johnsson;M. Coppens
通讯作者：
J. van Ommen;S. Sasic;John van der Schaaf;S. Gheorghiu;F. Johnsson;M. Coppens