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Lookup NU author(s): Dr Magda CarrORCiD
This is the of an article that has been published in its final definitive form by American Physical Society, 2019.
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© 2019 American Physical Society. The passage of a mode-2 internal solitary wave (ISW) over a broad, isolated ridge was explored using both numerical simulations and laboratory experiments. At sufficient incident wave amplitude and speed, the interaction with the ridge caused a deceleration of the incident wave while also generating three wave types: leading mode-1 ISWs, a trailing mode-1 wave-packet, and a trailing mode-2 ISW. The trailing mode-2 ISW was formed as the second piece of the fissioned incident wave. While mode-mode interactions are not part of typically applied weakly nonlinear theories, the fissioning of the leading mode-2 ISW into two mode-2 waves is predicted qualitatively by weakly-nonlinear theory. However, the present study is, to our knowledge, the first experimental and numerical confirmation of the detailed evolution of this phenomenon. In contrast to the previously studied transit of a mode-2 ISW onto a shelf, the parameters quantifying the strength of each resultant wave are found to be independent, having no singular predictor existing for all waves. Lastly, cross-boundary layer transport was found to be more strongly dependent on Reynolds number than on incident wave or background conditions.
Author(s): Deepwell D, Stastna M, Carr M, Davies PA
Publication type: Article
Publication status: Published
Journal: Physical Review Fluids
Year: 2019
Volume: 4
Issue: 9
Online publication date: 16/09/2019
Acceptance date: 14/05/2019
Date deposited: 02/09/2019
ISSN (electronic): 2469-990X
Publisher: American Physical Society
URL: https://doi.org/10.1103/PhysRevFluids.4.094802
DOI: 10.1103/PhysRevFluids.4.094802
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