How to Cite

Ravindar, R., Sriram, V., Schimmels, S., & Stagonas, D. (2020). LARGE-SCALE AND SMALL-SCALE EFFECTS IN WAVE BREAKING INTERACTION ON VERTICAL WALL ATTACHED WITH LARGE RECURVE PARAPET. Coastal Engineering Proceedings, (36v), papers.22.


Two sets of experiments on the vertical wall attached with recurve parapets performed at 1:1 and 1:8 scale are compared to study the influence of scale, model and laboratory effects. The small-scale (1:8) experiment scaled to large-scale (1:1) using Froude scaling, and Cuomo et al. (2010) method are compared. Comparing both the methods for scaling impact pressure, Cuomo et al. (2010) predicts well in the impact zone, whereas Froude scaling is better in the up-rushing zone. In estimating integrated impact force, Froude scaling method over-estimates compared to Cuomo et al. (2010). Overall, Cuomo et al. (2010) work better for scaling up impact pressure and forces compared to Froude scaling method. These preliminary observations are based on one type of recurved parapets only.

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Bullock, G.N., A.R. Crawford, P.J. Hewson, M.J.A. Walkden, and P.A.D. Bird. 2001. The influence of air and scale on wave impact pressures. Coastal Engineering 42, 291–312.

Cuomo, G., Allsop, W., and S. Takahashi. 2010. Scaling wave impact pressures on vertical walls. Coastal Engineering, 57(6), 604-609.

Heller, V., 2011. Scale effects in physical hydraulic engineering models, Journal of Hydraulic Research, Vol. 49, 293-306.

Hughes, S.A., 1993. Advanced series on ocean engineering 7. Physical models and laboratory techniques in coastal engineering. World Scientific, London.

Ivicsics, L., 1978. Hydraulic models. Vizdok, Budapest.Kamphuis, J.W. (1974). Practical scaling of coastal models. Proc. 14th Coastal engineering conference, Copenhagen 3, 2086–2101, ASCE, New York.

Kobus, H., ed. 1980. Hydraulic modelling. German association for water resources and land improvement, Bulletin 7. Parey, Hamburg.

Le Méhauté, B., and D.M. Hanes (Eds.). 2005. Ocean engineering science (Vol. 9). Harvard University Press.

Martin, H., and R. Pohl (Eds.). 2000. Technische Hydromechanik 4 (Technical hydromechanics). Verlag fu¨r Bauwesen, Berlin [in German].

Novak, P., 1984. Scaling factors and scale effects in modelling hydraulic structures. Symp. Scale effects in modelling hydraulic structures 0(3), 1–5. H. Rouse, ed. Technische Akademie, Esslingen.

Ravindar, R., V. Sriram, S. Schimmels, and D. Stagonas. 2019. Characterization of breaking wave impact on a vertical wall with recurve. ISH Journal of Hydraulic Engineering, 1-9.

Schuttruempf, H., and H. Oumeraci. 2005. Scale and model effects in crest level design. Proc. 2nd. Coastal Symposium, 1–12. Hoefn, Iceland.

Streicher, M., A. Kortenhaus, C. Altomare, S. Hughes, K. Marinov, B. Hofland, X. Chen, T. Suzuki, and L. Cappietti. 2019. Non-Repeatability, Scale-and Model Effects in Laboratory measurement of Impact Loads Induced by an Overtopped Bore on a Dike Mounted Wall. In International Conference on Offshore Mechanics and Arctic Engineering (Vol. 58783, p. V003T02A032). American Society of Mechanical Engineers.

Yalin, M.S., 1971. Theory of hydraulic models. Macmillan, London.

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