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

doi:10.36688/ewtec-2023-142

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

Offshore Engineering

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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.

Original language	English
Title of host publication	Vol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference
Publisher	EWTEC
Number of pages	10
Volume	15
DOIs	https://doi.org/10.36688/ewtec-2023-142
Publication status	Published - 2023
Event	The 15th European Wave and Tidal Energy Conference - University of the Basque Country, Bizkaia Aretoa, Bilbao, Spain Duration: 3 Sep 2023 → 7 Sep 2023 https://ewtec.org/ewtec-2023/

Conference

Conference	The 15th European Wave and Tidal Energy Conference
Abbreviated title	EWTEC 2023
Country/Territory	Spain
City	Bilbao
Period	3/09/23 → 7/09/23
Internet address	https://ewtec.org/ewtec-2023/

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.

Keywords

wave energy
oscillating water colum
BEM
CFD
EU-SCORES

Access to Document

10.36688/ewtec-2023-142

Embargoed Document

Numerical modelling of a box-type bottom-detached oscillating water column wave energy conversion device: a comparison of experimental data with BEM and CFD numerical modelling
Final published version, 2.99 MB
Embargo ends: 2/03/24

Cite this

Raghavan, V., Simonetti, I., Lavidas, G., Metrikine, A., & Cappietti, L. (2023). 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. In Vol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference (Vol. 15). [142] EWTEC. https://doi.org/10.36688/ewtec-2023-142

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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",

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 (Delaur{\'e} et. al. 2003, Bingham et. al. 2015, Fa{\"y} 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.",

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Raghavan, V, Simonetti, I, Lavidas, G , Metrikine, A & Cappietti, L 2023, 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. in Vol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference. vol. 15, 142, EWTEC, The 15th European Wave and Tidal Energy Conference, Bilbao, Spain, 3/09/23. https://doi.org/10.36688/ewtec-2023-142

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. / Raghavan, Vaibhav; Simonetti, Irene; Lavidas, George et al.

Vol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference. Vol. 15 EWTEC, 2023. 142.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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AU - Raghavan, Vaibhav

AU - Simonetti, Irene

AU - Lavidas, George

AU - Metrikine, Andrei

AU - Cappietti, Lorenzo

N1 - 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.

PY - 2023

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N2 - 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.

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KW - EU-SCORES

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Raghavan V, Simonetti I, Lavidas G , Metrikine A, Cappietti L. 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. In Vol. 15 (2023): Proceedings of the European Wave and Tidal Energy Conference. Vol. 15. EWTEC. 2023. 142 doi: 10.36688/ewtec-2023-142