色散(光学)
无量纲量
压力降
机械
材料科学
粘度
粒子(生态学)
反向
颗粒密度
热力学
分析化学(期刊)
化学
复合材料
色谱法
光学
体积热力学
物理
数学
地质学
几何学
海洋学
作者
Kyoung I. I. Lee,Sung Mo Son,Uk Yeong Kim,Yong Kang,Suck Hwan Kang,Sang Done Kim,Jea Keun Lee,Yong-Chil Seo,Woo Hyun Kim
标识
DOI:10.1016/j.ces.2007.08.024
摘要
Abstract Dispersion characteristics of low density fluidized particles such as polyethylene and polypropylene were investigated by using the stochastic method in three-phase inverse fluidized beds with viscous liquid medium ( 0.152 m ID × 2.5 m in height). To establish the relationship between the pressure drop variation and the particle dispersion in test section, the histogram of pressure drop fluctuations were also measured and analyzed. Effects of operating variables such as gas and liquid velocities, liquid viscosity and media particle kind (density) on the fluctuating frequency, dispersion coefficient and exiting rate of media particles from the test section were determined. The fluctuating frequency and dispersion coefficient of particles increased with increasing gas or liquid velocity, but decreased considerably with increasing liquid viscosity in three-phase inverse fluidized beds. The dispersion coefficient of media particles of relatively higher density exhibited a value higher than that of lower density particles. The dispersion coefficients of particles were well correlated with operating variables in terms of dimensionless groups.
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