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

Vaibhav Raghavan*, Irene Simonetti, George Lavidas, Andrei Metrikine, Lorenzo Cappietti

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


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 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.
Original languageEnglish
Title of host publicationVol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference
Number of pages10
Publication statusPublished - 2023
EventThe 15th European Wave and Tidal Energy Conference - University of the Basque Country, Bizkaia Aretoa, Bilbao, Spain
Duration: 3 Sep 20237 Sep 2023


ConferenceThe 15th European Wave and Tidal Energy Conference
Abbreviated titleEWTEC 2023
Internet address

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  • wave energy
  • oscillating water colum
  • BEM
  • CFD

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