Clustering behavior of solid particles in two-dimensional liquid–solid fluidized-beds--颗粒学报PARTICUOLOGY

An, X., Liu, M., & Fu, Y. (2007). Clustering behavior of solid particles in two-dimensional liquid–solid fluidized-beds. China Particuology, 5(5), 305–311. https://doi.org/10.1016/j.cpart.2007.07.001

Clustering behavior of solid particles in two-dimensional liquid–solid fluidized-beds

Xiaodong An ^a, Mingyan Liu ^a b *, Yunguan Fu ^a

a School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China b State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China

10.1016/j.cpart.2007.07.001

Volume 5, Issue 5, October 2007, Pages 305-311

Received 26 January 2007, Accepted 5 July 2007, Available online 17 September 2007.

E-mail: myliu@tju.edu.cn

Highlights

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.

Graphical abstract

Keywords

CCD; Liquid–solid fluidized-bed; Fractal dimension; Cluster; Self-organization structure

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