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South-Central Section - 50th Annual Meeting - 2016

Paper No. 9-11
Presentation Time: 5:05 PM

LARGE EDDY SIMULATION OF SUSPENDED SEDIMENTS IN SHALLOW WATER


LIU, Jinliang, Department of Oceanography & Coastal Sciences, Louisiana State University, Baton Rouge, LA 70803, LIANG, Junhong, Center for Computation & Technology, Louisiana State University, Baton Rouge, LA 70803; Department of Oceanography & Coastal Sciences, Louisiana State University, Baton Rouge, LA 70803; Coastal Studies Institute, Louisiana State University, Baton Rouge, LA 70803 and CHEN, Qin, Department of Civil and Environmental Engineering, Louisiana State University, BATON ROUGE, LA 70803; Coastal Studies Institute, Louisiana State University, Baton Rouge, LA 70803; Center for Computation & Technology, Louisiana State University, Baton Rouge, LA 70803, jliu73@lsu.edu

In coastal shallow water (~10 meters), turbulent flows driven by meteorological conditions at the ocean surface are capable of filling the whole water column and reaching the seabed. Observations show that those turbulent structures play an important role in keeping suspended sediments in the water column thereby contributing to cross-shore sediment transport. To better understand the effect of water column turbulence on sediment processes, we configure a turbulence-resolving large-eddy simulation (LES) model for a shallow water column and couple the LES model with a model for suspended sediment concentrations. We examine solutions driven by different meteorological conditions (wind, wave, and heat flux) and for sediments of different settling speeds. Results on instantaneous sediment plume structures and the ensemble statistics of sediment concentrations will be discussed.

Session No. 9

T9. Coastal and Shelf Sediment Transport Processes and Products of the Northern Gulf of Mexico
Monday, 21 March 2016: 1:30 PM-5:30 PM
Governor Room (Hilton Baton Rouge Capitol Center)
Geological Society of America Abstracts with Programs. Vol. 48, No. 1
doi: 10.1130/abs/2016SC-273595
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