Simplified Physically Based Model for Estimating Effective Floc Density
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 8
Abstract
This paper applies dimensional analysis to propose an alternative model for estimating the effective density of flocs (). 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 ( and ), which were calibrated by using data available in the literature. Values of and were obtained. The average value of the primary particle size () 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.
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Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 8 • August 2011
Pages: 843 - 846
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 2, 2009
Accepted: Oct 28, 2010
Published online: Jan 24, 2011
Published in print: Aug 1, 2011
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