A novel approach that introduces the Boussinesq-type like equations into an implicit non-hydrostatic model, free of irrotational flow assumption, is presented. The basic concept is to obtain an analytical-based form of pressure distribution at the top layer by matching the reference velocity under a virtual grid system with the one under a non-hydrostatic model grid system. Locations of the references velocities are tuned to optimize the linear wave dispersion property in the model. Efficiency of this non-hydrostatic model with Boussinesq-type equations (NHM-BTE) is critically examined through several free-surface wave examples. Overall model results show that NHM-BTE using only a few vertical layers (i.e., two ∼ four) is capable of accurately simulating highly dispersive wave motion and wave transformation over irregular bathymetry.
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ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2009
Honolulu, Hawaii, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4346-8
PROCEEDINGS PAPER
Efficient Non-Hydrostatic Modeling for Free Surface Waves in Deep and Shallow Water
Chin H. Wu,
Chin H. Wu
University of Wisconsin-Madison, Madison, WI
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Chih-Chieh Young
Chih-Chieh Young
National Taiwan University, Taipei, Taiwan
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Chin H. Wu
University of Wisconsin-Madison, Madison, WI
Chih-Chieh Young
National Taiwan University, Taipei, Taiwan
Paper No:
OMAE2009-79894, pp. 551-558; 8 pages
Published Online:
February 16, 2010
Citation
Wu, CH, & Young, C. "Efficient Non-Hydrostatic Modeling for Free Surface Waves in Deep and Shallow Water." Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Volume 6: Materials Technology; C.C. Mei Symposium on Wave Mechanics and Hydrodynamics; Offshore Measurement and Data Interpretation. Honolulu, Hawaii, USA. May 31–June 5, 2009. pp. 551-558. ASME. https://doi.org/10.1115/OMAE2009-79894
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