Near-Bottom Turbulence and Sediment Resuspension Induced by Nonlinear Internal Waves
2011
Diamessis, Peter J | Jacobs, Gustaaf B
The long-term goal of this work is to develop a fundamental understanding of the underlying physics of the interaction of nonlinear internal waves (NLIWs) with the continental shelf seafloor over a broad range of environmental conditions. We are particularly interested in how such interactions impact underwater optics and acoustics and shelf energetics and ecology by simulating enhanced bottom boundary layer (BBL) turbulence and particulate resuspension leading to benthic nepheloid layer (BNL) formation. The specific objectives of this project are as follows: use Large-Eddy Simulations (LES) to investigate the structural transition to turbulence within the separated BBL layer under a NLIW of depression and quantify the resulting NLIW energy losses; use Lagrangian coherent structure (LCS) theory to capture near-bed particles caused by BBL turbulence and understand their transport/deposition into BNLs; and analyze field observations from the New Jersey shelf to better understand BBL physics and the underlying fluid mechanics.
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