Midfidelity Model Verification for a Point-Absorbing Wave Energy Converter with Linear Power Takeoff: Preprint

Eirini Katsidoniatski, Yi-Hsiang Yu, Malin Goteman

Research output: Contribution to conferencePaper


In the preliminary design stage of a wave energy converter (WEC), fast and reliable simulation tools are required. High-fidelity numerical models are usually employed to study the wave-structure interaction, yet the computational cost is demanding. Instead, mid-fidelity models provide simulations in the order of real time. In this study, Uppsala University WEC operates in a relatively mild sea state and is modeled using WEC-Sim. The model is verified based on OpenFOAM simulations. To analyze the ability of mid-fidelity model to capture the WEC dynamics, the system is investigated separately in 1, 2 and 3 DoF. The contribution of viscous phenomena is examined. Moreover, linear and weakly non-linear solutions provided by WEC-Sim are studied. The results obtained indicate that the viscous effects in heave and surge motion can be neglected but not for the pitch. The weakly non-linear WEC-Sim solution successfully agrees with the CFD, whereas the linear solution could drive to misleading results.
Original languageAmerican English
Number of pages12
StatePublished - 2021
Event14th European Wave and Tidal Energy Conference - Plymouth, United Kingdom
Duration: 5 Sep 20219 Sep 2021


Conference14th European Wave and Tidal Energy Conference
CityPlymouth, United Kingdom

Bibliographical note

See NREL/CP-5000-81754 for paper as published in proceedings

NREL Publication Number

  • NREL/CP-5700-78569


  • CFD
  • hydrodynamic analysis
  • numerical simulations
  • offshore renewables
  • point-absorber
  • verification
  • wave energy
  • wave-structure interaction
  • WEC-Sim


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