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    Development towards a nested hydrodynamic model for the numerical analysis of ocean wave energy systems


    Kemper, Jost and Windt, Christian and Graf, Kai and Ringwood, John (2019) Development towards a nested hydrodynamic model for the numerical analysis of ocean wave energy systems. European Tidal and Wave Energy Conference Proceedings (1414). ISSN 2706-6940

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    Abstract

    Numerical wave tanks (NWTs) provide a cost efficient and accurate tool to assess the complex fluid dynamic field around wave energy converters (WECs). In recent years, high fidelity methods based on the Reynolds-averaged NavierStokes (RANS) equations are increasingly applied for this type of analysis. However, the computational cost for a RANS-based analysis of WECs is very high, compared to lower fidelity models based on e.g. potential flow (PF) theory. Nested hydrodynamic models can combine the advantages of RANS and PF solvers. Only the near flow field of the WEC is considered in the RANS solver, whereas the far field is solved using the PF model. Thus, the overall computational effort can be decreased, with respect to pure RANS models, while maintaining a high accuracy of the solution in the region local to the device. This paper presents the development towards a new, two-way coupled, nested hydrodynamic model for future application in wave energy. The proposed nested model is successfully verified and validated against theoretical and experimental data. Some limitations are found, which hamper the applicability of the method with respect to parallelised and three dimensional cases, and should be addressed as part of future work.

    Item Type: Article
    Additional Information: Funding: Jost Kemper is supported by the German Academic Scholarship Foundation. Christian Windt is supported by Science Foundation Ireland under Grant No. 13/IA/1886.
    Keywords: Wave energy; Computational fluid dynamics; Numerical wave tanks; Domain decomposition;
    Academic Unit: Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Faculty of Science and Engineering > Electronic Engineering
    Item ID: 14288
    Depositing User: Professor John Ringwood
    Date Deposited: 31 Mar 2021 14:43
    Journal or Publication Title: European Tidal and Wave Energy Conference Proceedings
    Publisher: EWTEC
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    URI:

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