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Large Eddy Simulation of Sediment Transport Over Rippled Beds : Volume 21, Issue 6 (05/12/2014)

By Harris, J. C.

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Book Id: WPLBN0003991659
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: Large Eddy Simulation of Sediment Transport Over Rippled Beds : Volume 21, Issue 6 (05/12/2014)  
Author: Harris, J. C.
Volume: Vol. 21, Issue 6
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Grilli, S. T., & Harris, J. C. (2014). Large Eddy Simulation of Sediment Transport Over Rippled Beds : Volume 21, Issue 6 (05/12/2014). Retrieved from

Description: Department of Ocean Engineering, University of Rhode Island, Narragansett, RI, USA. Wave-induced boundary layer (BL) flows over sandy rippled bottoms are studied using a numerical model that applies a one-way coupling of a far-field inviscid flow model to a near-field large eddy simulation (LES) Navier–Stokes (NS) model. The incident inviscid velocity and pressure fields force the LES, in which near-field, wave-induced, turbulent bottom BL flows are simulated. A sediment suspension and transport model is embedded within the coupled flow model. The numerical implementation of the various models has been reported elsewhere, where we showed that the LES was able to accurately simulate both mean flow and turbulent statistics for oscillatory BL flows over a flat, rough bed. Here we show that the model accurately predicts the mean velocity fields and suspended sediment concentration for oscillatory flows over full-scale vortex ripples. Tests show that surface roughness has a significant effect on the results. Beyond increasing our insight into wave-induced oscillatory bottom BL physics, sophisticated coupled models of sediment transport such as that presented have the potential to make quantitative predictions of sediment transport and erosion/accretion around partly buried objects in the bottom, which is important for a vast array of bottom deployed instrumentation and other practical ocean engineering problems.

Large eddy simulation of sediment transport over rippled beds

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