Transformation of internal waves passing over a bottom step
Article
Article Title | Transformation of internal waves passing over a bottom step |
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ERA Journal ID | 1294 |
Article Category | Article |
Authors | Churaev, Egor N. (Author), Semin, Sergey V. (Author) and Stepanyants, Yuri A. (Author) |
Journal Title | Journal of Fluid Mechanics |
Journal Citation | 768, pp. R3-1 |
Number of Pages | 11 |
Year | 2015 |
Publisher | Cambridge University Press |
Place of Publication | Cambridge, United Kingdom |
ISSN | 0022-1120 |
1469-7645 | |
Digital Object Identifier (DOI) | https://doi.org/10.1017/jfm.2015.92 |
Abstract | The transformation of small-amplitude internal waves on the oceanic shelf is studied numerically. The transmission and reflection coefficients are found for the simplified step-wise model of the oceanic shelf in a two-layer fluid. The approximate formulae are proposed for the transformation coefficients as functions of incident wavenumber, density ratio of layers, depth of the pycnocline and height of the bottom step. Results of direct numerical modelling of internal wave transformation are obtained and presented as functions of all aforementioned parameters. It is shown that there is a good agreement between the outcomes of approximate theory and numerical data. Both the theoretical and the numerical results agree well with the law of energy flux conservation. |
Keywords | coastal engineering; general fluid mechanics; internal waves |
ANZSRC Field of Research 2020 | 401207. Fundamental and theoretical fluid dynamics |
370803. Physical oceanography | |
490109. Theoretical and applied mechanics | |
Public Notes | © 2015 Cambridge University Press. Permanent restricted access to published version due to publisher copyright policy. |
Byline Affiliations | Nizhny Novgorod State Technical University, Russia |
School of Agricultural, Computational and Environmental Sciences | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2xw5/transformation-of-internal-waves-passing-over-a-bottom-step
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