期刊
COASTAL ENGINEERING
卷 83, 期 -, 页码 93-107出版社
ELSEVIER
DOI: 10.1016/j.coastaleng.2013.10.002
关键词
Non-hydrostatic; Wave breaking; Wave run-up; Depth-integrated; Momentum conservation; CCHE2D
资金
- Department of Homeland Security
- USDA Agriculture Research Service [58-6408-1-609]
This paper presents CCHE2D-NHWAVE, a depth-integrated non-hydrostatic finite element model for simulating nearshore wave processes. The governing equations are a depth-integrated vertical momentum equation and the shallow water equations including extra non-hydrostatic pressure terms, which enable the model to simulate relatively short wave motions, where both frequency dispersion and nonlinear effects play important roles. A special type of finite element method, which was previously developed for a well-validated depth-integrated free surface flow model CCHE2D, is used to solve the governing equations on a partially staggered grid using a pressure projection method. To resolve discontinuous flows, involving breaking waves and hydraulic jumps, a momentum conservation advection scheme is developed based on the partially staggered grid. In addition, a simple and efficient wetting and drying algorithm is implemented to deal with the moving shoreline. The model is first verified by analytical solutions, and then validated by a series of laboratory experiments. The comparison shows that the developed wave model without the use of any empirical parameters is capable of accurately simulating a wide range of nearshore wave processes, including propagation, breaking, and run-up of nonlinear dispersive waves and transformation and inundation of tsunami waves. (C) 2013 Elsevier B.V. All rights reserved.
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