Print Email Facebook Twitter Numerical modelling of a box-type and bottom-detached oscillating water column wave energy conversion device Title Numerical modelling of a box-type and bottom-detached oscillating water column wave energy conversion device: a comparison with experimental data and between BEM and CFD numerical modelling Author Raghavan, V. (TU Delft Offshore Engineering) Simonetti, Irene (University of Florence) Lavidas, G. (TU Delft Offshore Engineering) Metrikine, A. (TU Delft Offshore Engineering) Cappietti, Lorenzo (University of Florence) Date 2023 Abstract Utilization of Boundary Element Method (BEM) based on linear potential flow for modelling Oscillating Water Column (OWC) devices has gained popularity in the last two decades. The commercial BEM solver WAMIT has been used widely for modelling OWCs and validated using experimental modelling (Delauré et. al. 2003, Bingham et. al. 2015, Faÿ 2020). The open-source BEM solver NEMOH has however been mostly ineffective in modelling OWCs since the main approach adopted previously modelled the imaginary piston as a thin disk. In this research, the multi-body interaction problem has been adopted in modelling a box-type and bottom-detached OWC device in NEMOH, where the imaginary piston has been modelled to the length of the internal water column (Penalba et.al. 2017) and compared with experimental data. A further comparison is drawn with the numerical method of Computational Fluid Dynamics (CFD) , which has shown to be accurate for modelling OWC devices (Simonetti et. al. 2015), yet requires significantly higher computational resources than BEM. A two-dimensional CFD numerical wave tank, developed generating and absorbing waves with the waves2Foam toolbox (Jacobsen et al., 2012) of the open-source package OpenFOAM, is used for comparative purposes. Subject wave energyoscillating water columBEMCFDEU-SCORES To reference this document use: http://resolver.tudelft.nl/uuid:1b73ff3a-75c1-46d0-8997-4642426867ab DOI https://doi.org/10.36688/ewtec-2023-142 Publisher EWTEC Embargo date 2024-03-02 Source Vol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference, 15 Event The 15th European Wave and Tidal Energy Conference, 2023-09-03 → 2023-09-07, University of the Basque Country, Bizkaia Aretoa, Bilbao, Spain Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2023 V. Raghavan, Irene Simonetti, G. Lavidas, A. Metrikine, Lorenzo Cappietti Files PDF _2023_Numerical_modelling ... _EWTEC.pdf 3.08 MB Close viewer /islandora/object/uuid:1b73ff3a-75c1-46d0-8997-4642426867ab/datastream/OBJ/view