Transformation of mode-2 internal solitary wave over a pseudo slope-shelf
Source abstract
Abstract
Numerical simulations are performed to investigate the effect of wave amplitude in a numerical wave tank on the evolution of a convex mode-2 internal solitary wave (ISW) propagating over a pseudo slope-shelf. A finite volume method based on a Cartesian grid system is adopted to solve the Navier-Stokes equations using Improved Delayed Detached Eddy Simulation model for the turbulent closure. Numerical results reveal three types of waveform during wave generation on the flat bottom: (1) pseudo vortex shedding in the case of very large initial amplitude; (2) PacMan phenomenon in large amplitude; and (3) smooth mode-2 ISW for small amplitude. During wave propagation on the plateau, the first type of waveform induces a quasi-elevated mode-1 ISW; the second generates chaotic internal waves with significant reduction in amplitude; while the third renders a slightly deformed mode-2 ISW across the plateau. Moreover, the decrease in the magnitude of leading trough is more intense than that in the leading crest due to strong wave-obstacle interaction in the case of very large initial wave amplitude.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Ocean Waves and Remote Sensing · Oceanographic and Atmospheric Processes · Tropical and Extratropical Cyclones Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of System Engineering and Naval Architecture, National Taiwan Ocean University 1 , Keelung 20224, Taiwan, R.O.C
Department of Maritime Information and Technology, National Kaohsiung Marine University 2 , Kaohsiung 80543, Taiwan, R.O.C
School of Civil, Environmental and Mining Engineering, University of Western Australia 3 , Crawley WA 6009, Australia
Department of Marine Environment and Engineering, National Sun Yat-sen University 4 , Kaohsiung 80424, Taiwan, R.O.C
Institute of Physics, Academia Sinica 5 , Nankang, Taipei 11529, Taiwan, R.O.C
Funding
Ministry of Science and Technology, Taiwan
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Show source-provided references
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