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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.

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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
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URLURL TypeDescription volume no. 32 (2010) paper
Lamb, Michael P.0000-0002-5701-0504
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).
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East China Normal UniversitySKLEC200906
Record Number:CaltechAUTHORS:20130307-140920533
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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
Deposited By: Tony Diaz
Deposited On:19 Jul 2013 22:33
Last Modified:03 Oct 2019 04:47

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