Experimental study of hydraulic response of smooth submerged breakwaters to irregular waves
| Autor: | Fatemeh Hajivalie, Seyed Masoud Mahmoudof |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Atmospheric Science 010504 meteorology & atmospheric sciences Logarithm 010604 marine biology & hydrobiology Logarithmic growth Ocean Engineering Reflection Mechanics GC1-1581 Aquatic Science Dissipation Oceanography 01 natural sciences Laboratory measurements Wave flume Impermeable submerged breakwaters Breakwater Reflection (physics) Transmission Reduction (mathematics) Geology 0105 earth and related environmental sciences Dimensionless quantity |
| Zdroj: | Oceanologia, Vol 63, Iss 4, Pp 448-462 (2021) |
| ISSN: | 0078-3234 |
| Popis: | This paper presents the results of a laboratory experiment on transmission, reflection, and dissipation of irregular waves over smooth impermeable submerged breakwaters. Experiments included 75 JONSWAP-based irregular waves with five different wave characteristics generated at three water depths in a 2D wave flume. The investigated breakwater sections were three rectangular breakwaters with different widths, a toothed rectangular breakwater, and a trapezoidal breakwater with a slope of 1:2. A new comprehensive dimensionless parameter (β) was proposed representing both wave hydrodynamic and breakwater geometry characteristics. This parameter could be employed as a suitable descriptive option to make an accurate estimate of the hydraulic performances of submerged breakwaters. The β parameter is composed of four conventional simple dimensionless variables. However, the results revealed that the relative submergence depth significantly affects the hydraulic responses of submerged breakwaters. The transmission, reflection and dissipation of waves show a logarithmic growth, a logarithmic reduction, and a quadratic decreasing trend against the increasing of β parameter, respectively. The verifications of results revealed the high efficiency of β parameter for data reported by Carevic et al. (2013) with R2 = 0.88 and high agreement with predictions made by Van der Meer et al. (2005) formulation with R2 = 0.93. |
| Databáze: | OpenAIRE |
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