Voidage variation in packed beds at small column to particle diameter ratio
Voidage variation in packed beds at small column to particle diameter ratio
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DOI：
10.1002/aic.690490812
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发表时间：
2003-08-01
期刊：
影响因子：
3.7
通讯作者：
de Klerk, A
中科院分区：
文献类型：
--
作者：
de Klerk, A
等球随机填充床在近壁区表现出阻尼振荡空隙率变化。在文献中报道的模型被发现是缺乏他们的能力，将这种变化与平均床层孔隙度。空隙率振荡的变化平均值和偏离正弦曲线的行为也没有得到很好的描述。文中给出了实验数据和一个新的径向床层孔隙率模型。改进的径向床层空隙率和平均床层空隙率预测被证明。它已进一步表明，多个稳定的填充配置存在于相同的填充模式，这复杂的建模在一个小的柱粒径比。
Randomly packed beds of equal spheres exhibit damped oscillatory voidage variation in the near wall region. Models reported in literature were found to be lacking in their ability to relate this variation to average bed porosity. The changing mean of the voidage oscillations and deviations from sinusoidal behavior were not described well either. Experimental data and a new radial bed porosity model are presented. Improved radial bed voidage and average bed voidage predictions were demonstrated. It has further been shown that multiple stable packing configurations exist within the same packing mode, which complicates modeling at a small column to particle diameter ratio.