Please use this identifier to cite or link to this item: https://doi.org/10.1080/07373930802177719
Title: Probing heterogeneous structure of aggregates
Authors: Yang, Z.
Lee, D.-J.
Mujumdar, A. 
Peng, X.-F.
Su, A.
Hsu, C.
Keywords: CLSM
Floc
Multifractal
Structure
Issue Date: Aug-2008
Source: Yang, Z., Lee, D.-J., Mujumdar, A., Peng, X.-F., Su, A., Hsu, C. (2008-08). Probing heterogeneous structure of aggregates. Drying Technology 26 (8) : 1018-1023. ScholarBank@NUS Repository. https://doi.org/10.1080/07373930802177719
Abstract: Naturally occurring aggregates are considered of fractal or fractal-of-fractals interior structure. Recent studies utilizing dye staining and confocal laser scanning microscopy (CLSM) techniques have revealed the extremely complex, interconnected pore networks for floc interior. Detailed structural analysis on the real floc architecture is determined for building up a comprehensive floc model. This work interprets structural characteristics of flocs using multifractal analysis. A direct method by Chhabra and Jensen properly evaluated the singularity strength and singularity spectrum on architectures of two artificial fractal systems. However, direct evaluation of multifractal characteristics of wastewater flocs has limitations, alternatively acquiring analytical results to be misleading. Particularly, the singularity spectrum presents excessively large values in the limit as q → +∞ and exhibits very large error bars in the limit as q → -∞. This is attributable to the uneven distribution of mass in flocs and insufficient spatial resolutions provided by CLSM techniques. The flaws in applying multifractal analysis on naturally occurring objects are discussed.
Source Title: Drying Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/61151
ISSN: 07373937
DOI: 10.1080/07373930802177719
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