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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41350

Title: Numerical modeling of flow evolution for an internal solitary wave propagating over a submerged ridge
Authors: Chih-Min Hsieha;Robert R. Hwangb;John R.-C. Hsuc;Ming-Hung Cheng
Contributors: 國立臺灣海洋大學:系統工程暨造船學系
Keywords: Internal solitary wave;Numerical modeling;Volume of fluid (VOF) method;Flow field;Turbulent model
Date: 2015-06
Issue Date: 2017-02-14T08:10:45Z
Publisher: Wave Motion
Abstract: Abstract:Numerical simulations are performed to investigate the flow evolution of a depression ISW propagating over a submerged ridge. A finite volume based Cartesian grid method is adopted to solve the Reynolds averaged Navier–Stokes equations using a k−ε model for the turbulent closure. Results reveal a significant transient clockwise vortex and an internal hydraulic jump emerging on the front slope of the obstacle, during the wave–obstacle interaction. This interaction generates an asymmetrical interface and pycnocline thickness on both sides of the obstacle. During this process, the amplitude and velocity of the leading waveform increase transiently, but both quickly decrease once the wave passes the obstacle. As the ridge slope decreases, the wave–ridge interaction weakens, as well as the strength of vorticity and turbulent kinetic energy. In addition, the wave may affect the nutrient transport on the front slope to a maximum depth about 50% height of the obstacle or about 1.78 times of the incident wave amplitude when a large ISW breaks on the slope.
Relation: 55,pp.48-72
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41350
Appears in Collections:[系統工程暨造船學系] 期刊論文

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