Influence of convex and concave curvatures in a coastal dike line on wave run-up
Subramaniam, S.P.; Scheres, B.; Schilling, M.; Liebisch, S.; Kerpen, N.B.; Schlurmann, T.; Altomare, C.; Schüttrumpf, H. (2019). Influence of convex and concave curvatures in a coastal dike line on wave run-up. Water 11(7): 1333. https://dx.doi.org/10.3390/w11071333 In: Water. MDPI: Basel. e-ISSN 2073-4441, more |   |
| Keyword | | | Author keywords | curved dike; DualSPHysics; OpenFOAM; physical model tests; wave run-up |
| Authors | | Top | - Subramaniam, S.P.
- Scheres, B.
- Schilling, M.
- Liebisch, S.
| - Kerpen, N.B.
- Schlurmann, T.
- Altomare, C., more
- Schüttrumpf, H.
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| Abstract | Due to climatic change and the increased usage of coastal areas, there is an increasing risk of dike failures along the coasts worldwide. Wave run-up plays a key role in the planning and design of a coastal structure. Coastal engineers use empirical equations for the determination of wave run-up. These formulae generally include the influence of various hydraulic, geometrical and structural parameters, but neglect the effect of the curvature of coastal dikes on wave run-up and overtopping. The scope of this research is to find the effects of the dike curvature on wave run-up for regular wave attack by employing numerical model studies for various dike-opening angles and comparing it with physical model test results. A numerical simulation is carried out using DualSPHysics, a mesh-less model and OpenFOAM, a mesh-based model. A new influence factor is introduced to determine the influence of curvature along a dike line. For convexly curved dikes (αd = 210° to 270°) under perpendicular wave attack, a higher wave run-up was observed for larger opening angles at the center of curvature whereas for concavely curved dikes (αd = 90° to 150°) under perpendicular wave attack, wave run-up increases at the center of curvature as the opening angle decreases. This research aims to contribute a more precise analysis and understanding the influence of the curvature in a dike line and thus ensuring a higher level of protection in the future development of coastal structures. |
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