Evaluation of the overset grid method for control studies of wave energy converters in OpenFOAM numerical wave tanks
Autor: | Dominic D. J. Chandar, Nicolás Faedo, Christian Windt, Josh Davidson, John V. Ringwood |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Computer science
020209 energy Energy maximising control Energy Engineering and Power Technology 020101 civil engineering Ocean Engineering 02 engineering and technology Computational fluid dynamics Mesh motion 0201 civil engineering Distortion problem Distortion 0202 electrical engineering electronic engineering information engineering OpenFOAM SDG 7 - Affordable and Clean Energy Computer Science::Distributed Parallel and Cluster Computing ComputingMethodologies_COMPUTERGRAPHICS Water Science and Technology business.industry Renewable Energy Sustainability and the Environment Overset grids Morphing Test case Computer Science::Graphics Control system Numerical wave tank business Energy (signal processing) Marine engineering Numerical stability |
Zdroj: | Windt, C, Davidson, J, Chandar, D D J, Faedo, N & Ringwood, J V 2019, ' Evaluation of the overset grid method for control studies of wave energy converters in OpenFOAM numerical wave tanks ', Journal of Ocean Engineering and Marine Energy . https://doi.org/10.1007/s40722-019-00156-5 |
DOI: | 10.1007/s40722-019-00156-5 |
Popis: | Computational fluid dynamics (CFD)-based numerical wave tanks are valuable tools for the development and evaluation of energy maximising control systems for wave energy converters (WECs). However, the exaggerated body motion amplitude, which can be induced by the energy maximising control system, challenges the commonly applied mesh morphing method in CFD, due to the resulting mesh distortion and subsequent numerical instability. A more advanced mesh motion method is the overset grid method, which can inherently handle large-amplitude body motions and has recently become freely available in the open-source CFD software OpenFOAM. The overset grid method can, therefore, potentially eliminate the mesh distortion problem, hindering the simulation of WECs under controlled conditions. To evaluate the capability of the overset grid method for control studies of WECs in an OpenFOAM numerical wave tank, this paper presents a detailed comparison of the overset grid and mesh morphing methods, considering five test cases of increasing complexity. The test cases range from a static equilibrium test to the modelling of a controlled WEC, and good agreement is demonstrated between the two mesh motion methods, except for the case of the controlled WEC, when the device motion becomes large, and the mesh morphing simulation crashes. The runtimes for overset grid simulations are observed to be approximately double the time required for the mesh morphing simulations. |
Databáze: | OpenAIRE |
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