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Title: A higher-order non-hydrostatic sigma model for simulating non-linear refraction-diffraction of water waves
Authors: Chih-Chieh Young;Chin Wu;Wen-Cheng Liu;Jan-Tai Kuo
Contributors: 國立臺灣海洋大學:海洋環境資訊學系
Date: 2009-09
Issue Date: 2017-10-24T08:49:44Z
Publisher: Coastal Engineering
Abstract: Abstract:A higher-order non-hydrostatic σ model is developed to simulate non-linear refraction–diffraction of water waves. To capture non-linear (or steep) waves, a 4th-order spatial discretization is utilized to approximate the large horizontal pressure gradient. A higher-order top-layer pressure treatment is further implemented to resolve wave propagation. The model's characteristics including linear wave dispersion and non-linearity are carefully examined. The accuracy of the present model using only two vertical layers is validated by laboratory data and the available results predicted by the non-linear Schrödinger equation, Boussinesq-type equations, the non-linear mild slope equation, and the Laplace equation. Features of harmonic generation as well as the influences of dispersion and non-linearity on wave energy transfer processes are discussed.
Relation: 130
Appears in Collections:[Department of Marine Environmental Informatics] Periodical Articles

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