学术
Clustering behavior of solid particles in two-dimensional liquid-solid fluidized-beds
Xiaodong An[1] Mingyan Liu[1,2] Yunguan Fu[1]
[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
文章出处:
《中国颗粒学报：英文版》-2007年5卷5期 -305-311页
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Clustering behavior of solid particles in two-dimensional liquid-solid fluidized-beds
Abstract:
In this paper, the clustering behavior of solid particles in a two-dimensional （2D） liquid-solid fluidized-bed was studied by using the charge coupled devices （CCD） imaging measuring and processing technique and was characterized by fractal analysis. CCD images show that the distribution of solid particles in the 2D liquid-solid fluidised-bed is not uniform and self-organization behavior of solid particles was observed under the present experimental conditions. The solid particles move up in the 2D fluidized-bed in groups or clusters whose configurations are often in the form of horizontal strands. The box fractal dimension of the cluster images in the 2D liquid-solid fluidized-bed increases with the rising of solid holdup and reduces with the increment of solid particle diameter and superficial liquid velocity. At given solid holdup and solid particle size, the lighter particles show smaller fractal dimensions.[著者文摘]
Key words:
CCD; Liquid-solid fluidized-bed; Fractal dimension; Cluster; Self-organization structure
基金资助:
Acknowledgment The authors would like to acknowledge the financial sup- ports under the National Natural Science Foundation of China （Grant No. 20576091） and Program for Changjiang Scholars and Innovative Research Team in University （PCSIRT）.
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