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A Dynamic Model for Coastal Mud Flocs with Distributed Fractal Dimension.
- Source :
-
Journal of Coastal Research . Jan2017, Vol. 33 Issue 1, p218-225. 8p. - Publication Year :
- 2017
-
Abstract
- Xu, C. and Dong, P., 2017. A dynamic model for coastal mud flocs with distributed fractal dimension. Suspended sediments entrained from muddy estuarine and coastal areas usually contain a large amount of mud flocs of various sizes and densities. The size and settling velocity of these mud flocs are unsteady and may vary over a large range. In most theoretical descriptions the mud flocs are treated as self-similar fractal entities with the fractal dimension being considered as either a constant or a simple function of the mean floc size. This deterministic description of fractal dimension has recently been found to be inadequate as for a given size class; fractal dimension of the mud flocs is not a single value but is distributed over a certain range. To address this problem this paper proposes a new flocculation model for the temporal evolution of floc size by considering the fractal dimensions for a given floc size class D to be normally distributed and validates the model with available experimental data. The proposed model is found to perform better in predicting the temporal evolution of floc size than that based on a single fixed floc-size-dependent fractal dimension, especially under high shear conditions and with large equilibrium floc size. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07490208
- Volume :
- 33
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Coastal Research
- Publication Type :
- Academic Journal
- Accession number :
- 120659743
- Full Text :
- https://doi.org/10.2112/JCOASTRES-D-15-00110.1