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Time-Averaged Turbulent Mixing and Vertical Concentration Distribution of High-Density Suspensions Formed Under Waves

Yan, Bing and Zhang, Qing-He and Lamb, Michael P. (2010) Time-Averaged Turbulent Mixing and Vertical Concentration Distribution of High-Density Suspensions Formed Under Waves. In: Coastal engineering 2010: proceedings of the 32nd international conference. New York , Coastal Engineering Research Council, pp. 1-8. ISBN 978-0-9896611-0-2 http://resolver.caltech.edu/CaltechAUTHORS:20130307-140920533

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Abstract

We analyzed oscillating flow data from U-tube experiments by Lamb et al. (2004) and found that the time-averaged turbulent kinetic energy (TKE) near bed decreased exponentially with height above the bed in high-density-suspension (HDS) flows under waves, and that the ratios of TKE distributions in the streamwise, cross-stream, and vertical dimensions were constant. Based on the finite-mixing-length theory, a semi-theoretical time-averaged suspended sediment concentration model for HDS was developed. To avoid the stability problems with the numerical solution, a simplified model was also formulated through combing the apparent Fickian diffusivity and the damping function. The comparison between the calculated results and measurements shows both models consider the effect of the sediment-induced stratification well.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://journals.tdl.org/icce/index.php/icce/issue/view/154PublisherProceedings volume no. 32 (2010)
http://dx.doi.org/10.9753/icce.v32.sediment.20DOIProceedings paper
Additional Information:© 2010 Coastal Engineering Research Council. The research was supported by the Open Foundation of State Key Laboratory of Estuarine and Coastal Research, East China Normal University (Grant No. SKLEC200906).
Funders:
Funding AgencyGrant Number
East China Normal University SKLEC200906
Record Number:CaltechAUTHORS:20130307-140920533
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130307-140920533
Official Citation:Yan, B., Zhang, Q., & Lamb, M. (2011). TIME-AVERAGED TURBULENT MIXING AND VERTICAL CONCENTRATION DISTRIBUTION OF HIGH-DENSITY SUSPENSIONS FORMED UNDER WAVES. Coastal Engineering Proceedings, 1(32), sediment.20. doi:10.9753/icce.v32.sediment.20
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37379
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:19 Jul 2013 22:33
Last Modified:19 Jul 2013 22:33

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