{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,19]],"date-time":"2026-03-19T05:42:53Z","timestamp":1773898973480,"version":"3.50.1"},"reference-count":27,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2020,7,2]],"date-time":"2020-07-02T00:00:00Z","timestamp":1593648000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>In this work, a novel Boundary Element Method (BEM) is developed and applied to the investigation of the performance of Oscillating Water Column (OWC) systems, taking into account the interaction of the incident wave field with the bottom topography. The modelling includes the effect of additional upwave walls and barriers used to modify the resonance characteristics of the device and improve its performance as the U-OWC configuration. Numerical results illustrating the effects of depth variation in conjunction with other parameters\u2014such as chamber dimensions as well as the parameters associated with the turbine and power take-off system\u2014on the device performance are presented and discussed. Finally, a case study is presented regarding the potential installation of an OWC in a selected port site in the Black Sea, characterized by a good wave energy potential, on the coast of Romania.<\/jats:p>","DOI":"10.3390\/en13133403","type":"journal-article","created":{"date-parts":[[2020,7,3]],"date-time":"2020-07-03T06:51:20Z","timestamp":1593759080000},"page":"3403","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["A BEM for the Hydrodynamic Analysis of Oscillating Water Column Systems in Variable Bathymetry"],"prefix":"10.3390","volume":"13","author":[{"given":"Kostas","family":"Belibassakis","sequence":"first","affiliation":[{"name":"School of Naval Architecture &amp; Marine Engineering, National Technical University of Athens, Heroon Polytechniou 9, 15780 Zografou, Greece"}]},{"given":"Alexandros","family":"Magkouris","sequence":"additional","affiliation":[{"name":"School of Naval Architecture &amp; Marine Engineering, National Technical University of Athens, Heroon Polytechniou 9, 15780 Zografou, Greece"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6899-8442","authenticated-orcid":false,"given":"Eugen","family":"Rusu","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, University Dunarea de Jos of Galati, Strada Domneasc\u0103 47, 800008 Gala\u021bi, Romania"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,2]]},"reference":[{"key":"ref_1","unstructured":"Falc\u00e3o, A.F.O. (2000, January 4\u20136). The shoreline OWC wave power plant at the Azores. Proceedings of the 4th European Wave Energy Conference, Aalborg, Denmark."},{"key":"ref_2","unstructured":"Boake, C., Whittaker, T., Folley, M., and Hamish, E. (2002, January 26\u201331). Overview and Initial Operational Experience of the LIMPET Wave Energy Plant. Proceedings of the 12th International Offshore and Polar Engineering Conference, Kitakyushu, Japan."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Belibassakis, K., Bonovas, M., and Rusu, E. (2018). A Novel Method for Estimating Wave Energy Converter Performance in Variable Bathymetry Regions and Applications. Energies, 11.","DOI":"10.3390\/en11082092"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Bonovas, M., Belibassakis, K., and Rusu, E. (2019). Multi-DOF WEC Performance in Variable Bathymetry Regions Using a Hybrid 3D BEM and Optimization. Energies, 12.","DOI":"10.3390\/en12112108"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Magkouris, A., Bonovas, M., and Belibassakis, K. (2020). Hydrodynamic analysis of surge-type wave energy devices in variable bathymetry by means of BEM. Fluids, 5.","DOI":"10.3390\/fluids5020099"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1191","DOI":"10.1016\/S0029-8018(02)00102-6","article-title":"On a new wave energy absorber","volume":"30","author":"Boccotti","year":"2003","journal-title":"Ocean. Eng."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Malara, G., and Arena, F. (2013, January 9\u201314). U\u2014Oscillating Water Column in random waves: Modelling and Performances. Proceedings of the 32nd International Conference on Ocean, Offshore and Arctic Engineering, Nantes, France.","DOI":"10.1115\/OMAE2013-10923"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Katz, J., and Plotkin, A. (2001). Low-Speed Aerodynamics, Cambridge University Press. [2nd ed.].","DOI":"10.1017\/CBO9780511810329"},{"key":"ref_9","unstructured":"Coddington, E., and Levinson, N. (1972). Theory of Ordinary Differential Equations, McGraw Hill Publishing Co. Ltd.. [TMH ed.]."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1016\/j.renene.2012.11.018","article-title":"A novel radial self-rectifying air turbine for use in wave energy converters. Part 2. Results from model testing","volume":"53","author":"Gato","year":"2013","journal-title":"Renew. Energy"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"899","DOI":"10.1016\/j.rser.2009.11.003","article-title":"Wave energy utilization: A review of the technologies","volume":"14","year":"2010","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1391","DOI":"10.1016\/j.renene.2015.07.015","article-title":"Oscillating-water-column wave energy converters and air turbines: A review","volume":"85","author":"Henriques","year":"2016","journal-title":"Renew. Energy"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"7649","DOI":"10.1029\/98JC02622","article-title":"A third-generation wave model for coastal regions. Part 1: Model description and validation","volume":"C4","author":"Booij","year":"1999","journal-title":"J. Geophys. Res."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"2185","DOI":"10.1175\/JCLI-D-12-00823.1","article-title":"The NCEP climate forecast system version 2","volume":"27","author":"Saha","year":"2014","journal-title":"J. Clim."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"10370","DOI":"10.3390\/en80910370","article-title":"Assessment of the Wave Energy in the Black Sea Based on a 15-Year Hindcast with Data Assimilation","volume":"8","author":"Rusu","year":"2015","journal-title":"Energies"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1177\/0144598717736389","article-title":"A joint evaluation of wave and wind energy resources in the Black Sea based on 20-year hindcast information","volume":"36","author":"Rusu","year":"2018","journal-title":"Energy Explor. Exploit."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1146","DOI":"10.1016\/j.renene.2019.03.017","article-title":"The wave and wind power potential in the western Black Sea","volume":"139","author":"Rusu","year":"2019","journal-title":"Renew. Energy"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Rusu, E. (2018). Study of the Wave Energy Propagation Patterns in the Western Black Sea. Appl. Sci., 8.","DOI":"10.3390\/app8060993"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Anton, I.A., Rusu, L., and Anton, C. (2019). Nearshore Wave Dynamics at Mangalia Beach Simulated by Spectral Models. J. Mar. Sci. Eng., 7.","DOI":"10.3390\/jmse7070206"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/0141-1187(94)90010-8","article-title":"Bivariate distributions with given marginals with an application to wave climate description","volume":"16","author":"Athanassoulis","year":"1994","journal-title":"Appl Ocean. Res."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0141-1187(02)00009-3","article-title":"Probabilistic description of metocean parameters by means of kernel density models. Part 1: Theoretical background and first results","volume":"24","author":"Athanassoulis","year":"2002","journal-title":"Appl. Ocean. Res."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1177\/0144598716629872","article-title":"Efficiency assessments for some state-of-the-art wind turbines in the coastal environments of the Black and the Caspian seas","volume":"34","author":"Onea","year":"2016","journal-title":"Energy Explor. Exploit."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"580","DOI":"10.1177\/0958305X17716947","article-title":"Assessment of the potential for developing combined wind-wave projects in the European nearshore","volume":"28","author":"Onea","year":"2017","journal-title":"SAGE Energy Environ."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"228","DOI":"10.1016\/j.renene.2019.02.082","article-title":"A 30-year projection of the future wind energy resources in the coastal environment of the Black Sea","volume":"139","author":"Rusu","year":"2019","journal-title":"Renew. Energy"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1016\/j.coastaleng.2017.10.012","article-title":"Nonlinear and viscous effects on the hydrodynamic performance of a fixed OWC wave energy converter","volume":"131","author":"Wang","year":"2018","journal-title":"Coast. Eng."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"539","DOI":"10.1016\/j.energy.2016.09.118","article-title":"Numerical energy balance analysis for an onshore oscillating water column wave energy converter","volume":"116","author":"Elhanafi","year":"2016","journal-title":"Energy J."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1016\/j.oceaneng.2013.05.028","article-title":"Development of a novel nonlinear system identification scheme for the pressure fluctuation inside an oscillating water column-wave energy converter","volume":"80","author":"Gkikas","year":"2014","journal-title":"Ocean Eng."}],"container-title":["Energies"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1073\/13\/13\/3403\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:46:20Z","timestamp":1760175980000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1073\/13\/13\/3403"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,7,2]]},"references-count":27,"journal-issue":{"issue":"13","published-online":{"date-parts":[[2020,7]]}},"alternative-id":["en13133403"],"URL":"https:\/\/doi.org\/10.3390\/en13133403","relation":{},"ISSN":["1996-1073"],"issn-type":[{"value":"1996-1073","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,7,2]]}}}