Wave transmission of deep-draft box-type bottom-detached breakwaters

verfasst von: Zihan Liu, Nils Goseberg, Lorenzo Cappietti
Abstract: Expanding human activity into offshore marine areas presents significant challenges. Protecting offshore structures and the areas within them from the destructive forces of large waves is of primary importance. Bottom-founded breakwaters are effective in shallow waters, whereas floating or bottom-detached breakwaters are more suitable for deeper waters. This study explored the transmission coefficient (k_t) of fixed box-type bottom-detached breakwaters (BDBs) with various dimensions under different wave conditions. A numerical wave flume based on Computational Fluid Dynamics (CFD) was validated using experimental measurements from a physical wave flume and employed to conduct a parametric study. The results indicated that the changes in wave steepness had a small effect on k_t of BDBs, while significant decreases in k_t were observed with the increase in relative draft (D_FB/L_w) and relative width (W_FB/L_w), where L_w presents wavelength. A predictive equation for k_t was derived from the numerical results and validated using the numerical data and the experimental data from present and previous studies. Within W_FB/L_w=0.004–0.43 and D_FB/L_w = 0.001–0.21, the proposed equation demonstrated considerable accuracy with a relative error within the range of (−20 %, 20 %). The Root Mean Square Errors (RMSEs) of the k_t predicted by the proposed equation and various experimental datasets were below 0.1.
Organisationseinheit(en): Forschungszentrum Küste
Externe Organisation(en): Università degli Studi di Firenze (UniFi)
Technische Universität Braunschweig
Typ: Artikel
Journal: Ocean engineering
Band: 331
ISSN: 0029-8018
Publikationsdatum: 22.04.2025
Publikationsstatus: Elektronisch veröffentlicht (E-Pub)
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Environmental engineering, Meerestechnik
Ziele für nachhaltige Entwicklung: SDG 14 – Lebensraum Wasser
Elektronische Version(en): https://doi.org/10.1016/j.oceaneng.2025.121208 (Zugang: Geschlossen)