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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|
|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.|
|Appears in Collections:||[海洋環境資訊系] 期刊論文|
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