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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
Historic
Publication Date:
2014
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 http://hawaiilibrary.net/


Description
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.

Summary
Large eddy simulation of sediment transport over rippled beds

Excerpt
Chou, Y. J. and Fringer, O. B.: Consistent discretization for simulations of flows with moving generalized curvilinear coordinates, Int. J. Numer. Meth. Fl., 62, 802–826, 2009.; Chou, Y.-J. and Fringer, O. B.: A model for the simulation of coupled flow-bed form evolution in turbulent flows, J. Geophys. Res., 115, C10041, doi:10.1029/2010JC006103, 2010.; Chow, F. K. and Street, R. L.: Explicit filtering and reconstruction turbulence modeling for large-eddy simulation of field-scale flows, Adv. Hydro-Sci. Eng., 6, 1–12, 2004.; Chow, F. K., Street, R. L., Xue, M., and Ferziger, J. H.: Explicit filtering and reconstruction turbulence modeling for large-eddy simulation of neutral boundary layer flow, J. Atmos. Sci., 62, 2058–2077, 2005.; Cui, A. and Street, R. L.: Large-eddy simulation of turbulent rotating convective flow development, J. Fluid Mech., 447, 53–84, 2001.; Davies, A. G.: The potential flow over ripples on the seabed, J. Mar. Res., 37, 743–759, 1979.; Davies, A. G. and Thorne, P. D.: Modeling and measurement of sediment transport by waves in the vortex ripple regime, J. Geophys. Res., 110, C05017, doi:10.1029/2004JC002468, 2005.; Dean, R. G. and Dalrymple, R. A.: Water Wave Mechanics for Engineers and Scientists, vol. 2 of Advanced Series on Ocean Engeneering, World Scientific Publishing Company, Singapore, 1991.; Eidsvik, K. J.: Large scale modelling of oscillatory flows over a rippled bottom, Cont. Shelf. Res., 26, 318–337, 2006.; Elghobashi, S.: On predicting particle-laden turbulent flows, Appl. Sci. Res., 52, 309–329, 1994.; Faraci, C. and Foti, E.: Evolution of small scale regular patterns generated by waves propagating over a sandy bottom, Phys. Fluids, 13, 1624–1634, 2001.; Fourrière, A., Claudin, P., and Andreotti, B.: Ripples and dunes in a turbulent stream, Part 1: Turbulent flow over a wavy bottom, unpublished data, 2007.; Germano, M.: A proposal for a redefinition of the turbulent stresses in the filtered Navier–Stokes equations, Phys. Fluids, 29, 2323–2324, 1986.; Gilbert, R. W., Zedler, E. A., Grilli, S. T., and Street, R. L.: Progress on nonlinear-wave-forced sediment transport simulation, IEEE J. Oceanic Eng., 32, 236–248, 2007.; Grasmeijer, B. T. and Kleinhans, M. G.: Observed and predicted bed forms and their effect on suspended sand concentration, Coast. Eng., 51, 351–371, 2004.; Green, M. O. and Black, K. P.: Suspended-sediment reference concentrations under waves: field observations and critical analysis of two predictive models, Coast. Eng., 38, 115–141, 1999.; Grilli, S. T. and Horrillo, J.: Numerical generation and absorption of fully nonlinear periodic waves, J. Eng. Mech.-ASCE, 123, 1060–1069, 1997.; Grilli, S. T. and Subramanya, R.: Numerical modeling of wave breaking induced by fixed or moving boundaries, Comput. Mech., 17, 374–391, 1996.; Grilli, S. T., Guyenne, P., and Dias, F.: A fully nonlinear model for three-dimensional overturning waves over arbitrary bottom, Int. J. Numer. Meth. Fl., 35, 829–867, 2001.; Grilli, S. T., Voropayev, S., Testik, F. Y., and Fernando, H. J. S.: Numerical modeling and experiments of wave shoaling over buried cylinders in sandy bottom, in: Proceedings of the 13th Offshore and Polar Engineering Conference, Honolulu, Hawaii, 405–412, 2003.; Grilli, S. T., Harris, J. C., and Greene, N.: Modeling of wave-induced sediment transport around obstacles, in: Proceedings of the 31st Coastal Engeneering Conference, World Scientific Publishing Company, Hamburg, Germany, 1638–1650, 2009.; Guyonic, S., Mory, M., Wever, T. F., Ardhuin, F., and Garlan, T.: Full-scale mine burial experiments in wave and current environments and comparisons with models, IEEE J. Oceanic Eng., 32, 119–132, 2007.; Hanes, D. M., Alymov, V., Chang, Y. S., and Jette, C.: Wave-formed sand ripples at Duck, North Carolina, J. Geophys. Res., 106, 22575–22592, 2001.; Hansen, E. A

 

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