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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50314

Title: Transformation of mode-2 internal solitary wave over a pseudo slope-shelf
Authors: Ming-Hung Cheng
Chih-Min Hsieh
John R.-C. Hsu
Robert R. Hwang
Contributors: 國立臺灣海洋大學:系統工程暨造船學系
Date: 2017-09
Issue Date: 2018-10-02T08:30:40Z
Publisher: AIP Advances
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.
Relation: 7(9)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50314
Appears in Collections:[系統工程暨造船學系] 期刊論文

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