2026-04-13T13:12:22Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4494682026-01-21T08:57:11Zcom_2072_1033col_2072_452950

urn:hdl:2117/449468 SPH-based modeling of a direct-drive WEC in extreme waves and currents Capasso, Salvatore Shahroozi, Zahra Göteman, Malin Martinez Estevez, Ivan Viccione, Giacomo Tagliafierro, Bonaventura Àrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària Extreme waves DualSPHysics Point-absorber Frictional PTO Waves and currents In this work, we present a fully Lagrangian framework specifically tailored to host point absorber WECs under violent wave–current excitations. Within the open-source DualSPHysics framework, based on the Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) method, a multipurpose wave tank is modeled to simulate extreme wave trains developing over uniform currents, by adopting the focusing strategy and high-order solutions. Moreover, a novel power take-off (PTO) model is implemented within the loop to unlock a swift characterization of different energetic proxy models. An Uppsala University WEC model is firstly validated under extreme sea states, and such framework is eventually tasked with the simulation of combined wave–current extreme events. The outcome we document suggests that complex buoy dynamics can develop in wave–current fields, with high sensitivity to the sea state representation: focused waves propagating over equally headed currents tend to maximize the line stretching and to develop extremely nonlinear kinematics. Floater displacement and anchoring tension patterns show no direct correlation with the wave–current layout and PTO configurations. Contrary to established knowledge, strong PTO damping does not always guarantee lower system stress. An all-around numerical strategy, leveraging high-fidelity modeling is presented, owning the necessary flexibility to anticipate both operational and ultimate limit state load combinations, accommodating increasing degrees of nonlinearity. S. Capasso and B. Tagliafierro acknowledge the MODENERLANDS European COST Action (CA20109) for supporting this research with the STSM funding scheme. We acknowledge the CINECA award under the ISCRA initiative, for the availability of high-performance computing resources and support. We are grateful for the computing resources from the Northern Ireland High Performance Computing (NI-HPC) service funded by EPSRC, UK (EP/T022175). This work was partially supported by the project SURVIWEC PID2020-113245RB-I00 financed by MCIN/AEI/10.13039/501100011033. I. Martínez-Estévez acknowledges funding from Xunta de Galicia under “Programa de axudas á etapa posdoutoral da Consellería de Educación, Ciencia, Universidades e Formación Profesional da Xunta de Galicia” (ED481B-2025/086). B. Tagliafierro acknowledges the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No: 101109440 (IM–POWER). Peer Reviewed Postprint (published version) 2025-12-01 Article https://www.sciencedirect.com/science/article/pii/S0141118725003943 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113245RB-I00/ES/SUPERVIVENCIA DE DISPOSITIVOS CAPTADORES DE ENERGIA DE LAS OLAS/ http://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International Elsevier