Advanced search
1 file | 9.10 MB Add to list

Irregular wave validation of a coupling methodology for numerical modelling of near and far field effects of wave energy converter arrays

Gael Verao Fernandez (UGent) , Vicky Stratigaki (UGent) and Peter Troch (UGent)
(2019) ENERGIES. 12(3). p.33-51
Author
Organization
Abstract
Between the Wave Energy Converters (WECs) of a farm, hydrodynamic interactions occur and have an impact on the surrounding wave field, both close to the WECs (" near field" effects) and at large distances from their location (" far field" effects). To simulate this " far field" impact in a fast and accurate way, a generic coupling methodology between hydrodynamic models has been developed by the Coastal Engineering Research Group of Ghent University in Belgium. This coupling methodology has been widely used for regular waves. However, it has not been developed yet for realistic irregular sea states. The objective of this paper is to present a validation of the novel coupling methodology for the test case of irregular waves, which is demonstrated here for coupling between the mild slope wave propagation model, MILDwave, and the ` Boundary Element Method'-based wave-structure interaction solver, NEMOH. MILDwave is used to model WEC farm " far field" effects, while NEMOH is used to model " near field" effects. The results of the MILDwave-NEMOH coupled model are validated against numerical results from NEMOH, and against the WECwakes experimental data for a single WEC, and for WEC arrays of five and nine WECs. Root Mean Square Error (RMSE) between disturbance coefficient (Kd) values in the entire numerical domain (RMSEKd, D) are used for evaluating the performed validation. The RMSEKd, D between results from the MILDwave-NEMOH coupled model and NEMOH is lower than 2.0% for the performed test cases, and between the MILDwave-NEMOH coupled model and the WECwakes experimental data RMSEKd, D remains below 10%. Consequently, the efficiency is demonstrated of the coupling methodology validated here which is used to simulate WEC farm impact on the wave field under the action of irregular waves.
Keywords
General Computer Science, numerical modeling, numerical coupling, wave propagation, MILDwave, wave-structure interaction, near field, far field, experimental validation, WECwakes project, wave energy converter arrays, IMPACT, SENSITIVITY

Downloads

  • PUB 258.pdf
    • full text (Published version)
    • |
    • open access
    • |
    • PDF
    • |
    • 9.10 MB

Citation

Please use this url to cite or link to this publication:

MLA
Verao Fernandez, Gael, et al. “Irregular Wave Validation of a Coupling Methodology for Numerical Modelling of near and Far Field Effects of Wave Energy Converter Arrays.” ENERGIES, vol. 12, no. 3, 2019, pp. 33–51, doi:10.3390/en12030538.
APA
Verao Fernandez, G., Stratigaki, V., & Troch, P. (2019). Irregular wave validation of a coupling methodology for numerical modelling of near and far field effects of wave energy converter arrays. ENERGIES, 12(3), 33–51. https://doi.org/10.3390/en12030538
Chicago author-date
Verao Fernandez, Gael, Vicky Stratigaki, and Peter Troch. 2019. “Irregular Wave Validation of a Coupling Methodology for Numerical Modelling of near and Far Field Effects of Wave Energy Converter Arrays.” ENERGIES 12 (3): 33–51. https://doi.org/10.3390/en12030538.
Chicago author-date (all authors)
Verao Fernandez, Gael, Vicky Stratigaki, and Peter Troch. 2019. “Irregular Wave Validation of a Coupling Methodology for Numerical Modelling of near and Far Field Effects of Wave Energy Converter Arrays.” ENERGIES 12 (3): 33–51. doi:10.3390/en12030538.
Vancouver
1.
Verao Fernandez G, Stratigaki V, Troch P. Irregular wave validation of a coupling methodology for numerical modelling of near and far field effects of wave energy converter arrays. ENERGIES. 2019;12(3):33–51.
IEEE
[1]
G. Verao Fernandez, V. Stratigaki, and P. Troch, “Irregular wave validation of a coupling methodology for numerical modelling of near and far field effects of wave energy converter arrays,” ENERGIES, vol. 12, no. 3, pp. 33–51, 2019.
@article{8656068,
  abstract     = {Between the Wave Energy Converters (WECs) of a farm, hydrodynamic interactions occur and have an impact on the surrounding wave field, both close to the WECs (" near field" effects) and at large distances from their location (" far field" effects). To simulate this " far field" impact in a fast and accurate way, a generic coupling methodology between hydrodynamic models has been developed by the Coastal Engineering Research Group of Ghent University in Belgium. This coupling methodology has been widely used for regular waves. However, it has not been developed yet for realistic irregular sea states. The objective of this paper is to present a validation of the novel coupling methodology for the test case of irregular waves, which is demonstrated here for coupling between the mild slope wave propagation model, MILDwave, and the ` Boundary Element Method'-based wave-structure interaction solver, NEMOH. MILDwave is used to model WEC farm " far field" effects, while NEMOH is used to model " near field" effects. The results of the MILDwave-NEMOH coupled model are validated against numerical results from NEMOH, and against the WECwakes experimental data for a single WEC, and for WEC arrays of five and nine WECs. Root Mean Square Error (RMSE) between disturbance coefficient (Kd) values in the entire numerical domain (RMSEKd, D) are used for evaluating the performed validation. The RMSEKd, D between results from the MILDwave-NEMOH coupled model and NEMOH is lower than 2.0% for the performed test cases, and between the MILDwave-NEMOH coupled model and the WECwakes experimental data RMSEKd, D remains below 10%. Consequently, the efficiency is demonstrated of the coupling methodology validated here which is used to simulate WEC farm impact on the wave field under the action of irregular waves.},
  articleno    = {538},
  author       = {Verao Fernandez, Gael and Stratigaki, Vicky and Troch, Peter},
  issn         = {1996-1073},
  journal      = {ENERGIES},
  keywords     = {General Computer Science,numerical modeling,numerical coupling,wave propagation,MILDwave,wave-structure interaction,near field,far field,experimental validation,WECwakes project,wave energy converter arrays,IMPACT,SENSITIVITY},
  language     = {eng},
  number       = {3},
  pages        = {538:33--538:51},
  title        = {Irregular wave validation of a coupling methodology for numerical modelling of near and far field effects of wave energy converter arrays},
  url          = {http://dx.doi.org/10.3390/en12030538},
  volume       = {12},
  year         = {2019},
}

Altmetric
View in Altmetric
Web of Science
Times cited: