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Simplified physically based model for estimating effective floc density

Nguyen, Hoang-Ha and Chua, Lloyd H.C. 2011, Simplified physically based model for estimating effective floc density, Journal of hydraulic engineering, vol. 137, no. 8, pp. 843-846, doi: 10.1061/(ASCE)HY.1943-7900.0000355.

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Title Simplified physically based model for estimating effective floc density
Author(s) Nguyen, Hoang-Ha
Chua, Lloyd H.C.ORCID iD for Chua, Lloyd H.C. orcid.org/0000-0003-2523-3735
Journal name Journal of hydraulic engineering
Volume number 137
Issue number 8
Start page 843
End page 846
Total pages 4
Publisher American Society of Civil Engineers
Place of publication Reston, Va.
Publication date 2011
ISSN 1943-5584
Keyword(s) density
dimensional analysis
fractals
particles
cohesive sediment
settling velocity
Summary This paper applies dimensional analysis to propose an alternative model for estimating the effective density of flocs (Δρf). The model takes into account the effective density of the primary particles, in addition to the sizes of the floc and primary particles, and does not consider the concept of self-similarity. The model contains three dimensionless products and two empirical parameters (αf and βf), which were calibrated by using data available in the literature. Values of αf=0.7 and βf=0.8 were obtained. The average value of the primary particle size (Dp) for the data used in the analysis, inferred from the new model, was found to vary from 0.05 μm to 100 μm with a mean value of 2.5 μm. Good comparisons were obtained in comparing the estimated floc-settling velocity on the basis of the proposed model for effective floc density with the measured value.
Language eng
DOI 10.1061/(ASCE)HY.1943-7900.0000355
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2011, American Society of Civil Engineers
Persistent URL http://hdl.handle.net/10536/DRO/DU:30063885

Document type: Journal Article
Collection: School of Engineering
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