Internal generation of waves on an arc in a rectangular grid system
- Authors
- Lee, Changhoon; Yoon, Sung Bum
- Issue Date
- Apr-2007
- Publisher
- ELSEVIER
- Keywords
- Arc-shaped line source; Extended mild-slope equations; Finite difference method; Internal generation of waves; Time-dependent
- Citation
- Coastal Engineering, v.54, no.4, pp 357 - 368
- Pages
- 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- Coastal Engineering
- Volume
- 54
- Number
- 4
- Start Page
- 357
- End Page
- 368
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/44352
- DOI
- 10.1016/j.coastaleng.2006.11.004
- ISSN
- 0378-3839
1872-7379
- Abstract
- This paper presents a technique to generate waves at oblique angles in finite difference numerical models in a rectangular grid system by using internal generation technique [Lee, C., Suh, K.D., 1998. Internal generation of waves for time-dependent mild-slope equations. Coast. Eng. 34, 35-57.] along an arc-shaped line source. Tests were made for four different types of wave generation layouts. Quantitative experiments were conducted under the following conditions: the propagation of waves on a flat bottom, the refraction and shoaling of waves on a planar slope, and the diffraction of waves to a semi-infinite breakwater. Numerical experiments were conducted using the extended mild-slope equations of Suh et al. [Suh, K.D., Lee, C., Park, W.S., 1997. Time-dependent equations for wave propagation on rapidly varying topography. Coast. Eng. 32, 91-117.]. The fourth layout type consisting of two parallel lines connected to a semicircle showed the best solutions, especially for a small grid size. This technique is useful for the numerical simulation of irregular waves with broad-banded directional spectrum using conventional spectral wave models for the reasonable estimation of bottom friction and wave-breaking. © 2006 Elsevier B.V. All rights reserved.
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