絮凝体的分形特性研究  

Study on fractal properties of flocs

作　　者：李冬梅[1] 谭万春[2] 黄明珠[1] 金同轨[2] 

机构地区：[1]广东工业大学建设学院,广州510643 [2]西安建筑科技大学环境与市政工程学院

出　　处：《给水排水》2004年第5期5-10,共6页Water & Wastewater Engineering

基　　金：国家自然科学基金项目(50078043)

摘　　要：试验现象及电镜照片研究表明,絮凝体表面和内部具有高度不规则性,絮凝体的结构及其形成过程具有分形特征。从絮凝体的密度、孔隙率,絮凝体的粒径分布,絮凝体的强度、沉速,絮凝条件与分数维的关系并结合黄河泥沙试验,概述了絮凝体的分形特性及结构特征,同时对影响絮凝体分形特性的因素进行了分析。Experimental observation and SEM photos show that interior and surface of the sediment flocs are highly irregular. There are evidently fractal properties in the structure of fractal flocs and during its structural formation. The fractal properties and structural characteristics of flocs, including the floc density and void ratio, particle size distribution, floc strength, settling velocity and condition of flocculation etc are discussed integrating with the experiment of Yellow River sediments. Also the factors which influenced the fractal properties of Yellow River sediment flocs are analyzed.

关 键 词：分维 粒径分布 絮凝体沉速 絮团密度 絮团强度 

分 类 号：TU991.22[建筑科学—市政工程]