Ocean Energy Systems Wave Energy Modelling Task: Modelling, Verification and Validation of Wave Energy Converters

Yi-Hsiang Yu, Thomas Mathai, Kim Nielsen, Harry Bingham, Claes Eskilsson, Morten Kramer, Aurelien Babarit, Tim Bunnik, Ronan Costello, Sarah Crowley, Benjamin Gendron, Giuseppe Giorgi, Simone Giorgi, Samuel Girardin, Deborah Greaves, Pilar Heras, Johan Hoffman, Hafizul Islam, Ken-Robert Jakobsen, Carl-Erik JansonJohan Jansson, Hyun Kim, Jeong-Seok Kim, Kyong-Hwan Kim, Adi Kurniawan, Massimiliano Leoni, Bo-Woo Nam, Sewan Park, Krishnakumar Rajagopalan, Edward Ransley, Robert Read, John Ringwood, Jose Rodrigues, Benjamin Rosenthal, Andre Roy, Kelley Ruehl, Paul Schofield, Wanan Sheng, Abolfazl Shiri, Sarah Thomas, Imanol Touzon, Imai Yasutaka, Fabian Wendt

Research output: Contribution to journalArticlepeer-review

44 Scopus Citations


The International Energy Agency Technology Collaboration Programme for Ocean Energy Systems (OES) initiated the OES Wave Energy Conversion Modelling Task, which focused on the verification and validation of numerical models for simulating wave energy converters (WECs). The long-term goal is to assess the accuracy of and establish confidence in the use of numerical models used in design as well as power performance assessment of WECs. To establish this confidence, the authors used different existing computational modelling tools to simulate given tasks to identify uncertainties related to simulation methodologies: (i) linear potential flow methods; (ii) weakly nonlinear Froude-Krylov methods; and (iii) fully nonlinear methods (fully nonlinear potential flow and Navier-Stokes models). This article summarizes the code-to-code task and code-to-experiment task that have been performed so far in this project, with a focus on investigating the impact of different levels of nonlinearities in the numerical models. Two different WECs were studied and simulated. The first was a heaving semi-submerged sphere, where free-decay tests and both regular and irregular wave cases were investigated in a code-to-code comparison. The second case was a heaving float corresponding to a physical model tested in a wave tank. We considered radiation, diffraction, and regular wave cases and compared quantities, such as the WEC motion, power output and hydrodynamic loading.

Original languageAmerican English
Article number379
Number of pages21
JournalJournal of Marine Science and Engineering
Issue number11
StatePublished - 2019

Bibliographical note

Publisher Copyright:
© 2019 by the authors.

NREL Publication Number

  • NREL/JA-5000-74955


  • Boundary element method
  • Computational fluid dynamics
  • Numerical modelling
  • Simulation
  • Wave energy


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