TÍNH TOÁN CÁC ĐẶC TRƯNG SÓNG Ở KHU VỰC NINH THUẬN - BÌNH THUẬN BẰNG MÔ HÌNH SWAN TRÊN LƯỚI PHI CẤU TRÚC

Tran Van Chung; Nguyen Huu Huan; Nguyen Truong Thanh Hoi

doi:10.15625/1859-3097/16/2/7387

Author affiliations

Authors

Tran Van Chung Institute of Oceanography, VAST
Nguyen Huu Huan Institute of Oceanography, VAST
Nguyen Truong Thanh Hoi Institute of Oceanography, VAST

DOI:

https://doi.org/10.15625/1859-3097/16/2/7387

Keywords:

Wave spectrum, SWAN, unstructured grid, finite difference, finite element.

Abstract

The wave model SWAN (version 41.01A) with unstructured grid has been applied for Ninh Thuan - Binh Thuan waters. This model is SWAN Cycle III using a vertex-based, fully implicit finite difference method. It can accommodate unstructured meshes with a high variability in geographic resolution suitable for representing complicated bottom topography in shallow areas and irregular shoreline. In particular, the unstructured meshes (triangular meshes) can be used to calculate the flow by finite element method. This is very helpful in solving the problems of interactions between wave-current and wave-wave. The initial results indicate that the approach to SWAN model is reasonable, stable for any time step while permitting local mesh refinements in interested areas. A lot of applications are shown to verify the correctness and numerical accuracy of the unstructured version of SWAN.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Holthuijsen, L. H., 2010. Waves in oceanic and coastal waters. Cambridge University Press. 404 p.

Ris, R. C., Holthuijsen, L. H., and Booij, N., 1999. A third‐generation wave model for coastal regions: 2. Verification. Journal of Geophysical Research: Oceans, 104(C4): 7667-7681. DOI: https://doi.org/10.1029/1998JC900123

Bilgili, A., Smith, K. W., and Lynch, D. R., 2006. BatTri: A two-dimensional bathymetry-based unstructured triangular grid generator for finite element circulation modeling. Computers & Geosciences, 32(5): 632-642. DOI: https://doi.org/10.1016/j.cageo.2005.09.007

Shewchuk, J., 1996. Triangle: Engineering a 2D quality mesh generator and Delaunay triangulator. In First Workshop on Applied Computational Geometry (pp. 124-133). ACM. DOI: https://doi.org/10.1007/BFb0014497

Booij, N., Ris, R. C., and Holthuijsen, L. H., 1999. A third‐generation wave model for coastal regions: 1. Model description and validation. Journal of geophysical research: Oceans, 104(C4): 7649-7666. DOI: https://doi.org/10.1029/98JC02622

Lentz, S. J., Fewings, M., Howd, P., Fredericks, J., and Hathaway, K., 2008. Observations and a model of undertow over the inner continental shelf. Journal of Physical Oceanography, 38(11): 2341-2357. DOI: https://doi.org/10.1175/2008JPO3986.1

Bùi Hồng Long, Trần Văn Chung, 2009. Tính toán dòng chảy trong khu vực nước trồi Nam Trung Bộ bằng mô hình dòng chảy ba chiều (3-D) phi tuyến. Tạp chí Khoa học và Công nghệ biển, 9(2): 1-25.

Long, B. H., and Van Chung, T., 2010. Some experimental calculations for 3D currents in the strong upwelling region of southern central Vietnam using finite element method. Marine biodiversity of East Asian Seas: Status, challenges and sustainable development.