【摘要】 水处理中的絮团具有复杂的形态结构,分维数是描述这种结构的有力工具。通过分析固液体系的粘度与絮团分维数之间的关系,提出了絮团粘性分维数的新概念及粘性分维数测定的数学物理模型,并进行了实验验证。与常用的质量分维数、边界分维数、面积分维数、体积分维数、表面积分维数等相比,絮团的粘性分维数及其测定模型具有易于测量、可同时表征不同类型絮团、可定量分析絮凝产品组成等特点,从而为絮团形态结构的定性及定量研究开辟了新的途径。更多还原

【Abstract】 The complex morphological structure of flocs yielded in water treatment can be analyzed quantitatively by fractal dimensions. The viscous fractal dimension as a new concept is presented,a math-physical model is derived in theory and verified by experiment to describe the relationship between apparent viscosity of flocculated suspensions and viscous fractal dimensions of flocs with different special morphologies. Compared with traditional fractal dimensions such as mass fractal dimension,one-,two-,three-dimensional fractal dimensions or surface fractal dimension,the new defined viscous fractal dimension is easier to be tested and makes it possible to determine the fractal dimensions and the relative compositions of different flocs. In a word,the viscous fractal dimension of flocs opens a new approach to the qualitative and quantitative research on the floc morphology.更多还原