| Clustering behavior of solid particles in two-dimensional liquid-solid fluidized-beds |
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| 作者姓名： | Xiaodong An Mingyan Liu Yunguan Fu |
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| 作者单位： | [1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China |
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| 基金项目： | 国家自然科学基金;教育部长江学者和创新团队发展计划 |
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| 摘 要： | 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.
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| 关 键 词： | 二维液固流化床 聚类分析 电荷耦合装置 自组织结构 |
| 收稿时间： | 26 January 2007 |
| 修稿时间： | 2007-01-26 |
Clustering behavior of solid particles in two-dimensional liquid-solid fluidized-beds |
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| Xiaodong An Mingyan Liu Yunguan Fu.Clustering behavior of solid particles in two-dimensional liquid-solid fluidized-beds[J].China Particuology,2007,5(5):305-311. |
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| Authors: | Xiaodong An Mingyan Liu Yunguan Fu |
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| Institution: | a School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
b State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China |
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| 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. |
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| Keywords: | CCD Liquid-solid fluidized-bed Fractal dimension Cluster Self-organization structure |
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