Development of a free heaving OWC model with non-linear PTO interaction

Connell, Ken O; Thiebaut, Florent; Kelly, Ger; Cashman, Andrew

doi:10.1016/j.renene.2017.10.027

Cited by 17 publications

(11 citation statements)

References 6 publications

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“…Fixed time step CFL condition [15,17,[22][23][24]33,41,50,51,53,63,58,66,75,95,108,134,160,162,166,167,178,[193][194][195][196][197][198][199]211] [122], chap.5, [99,165,186,191,192,209,206,207,212,213,222] between experimental results and numerical simulations are found for LES than the − k ω SST model, at a higher computational price.…”

Section: Large Eddy Simulation (Les)mentioning

confidence: 99%

High-fidelity numerical modelling of ocean wave energy systems: A review of computational fluid dynamics-based numerical wave tanks

Windt

Davidson

Ringwood

2018

Renewable and Sustainable Energy Reviews

167

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For the research and development (R&D) of wave energy converters (WECs), numerical wave tanks (NWTs) provide an excellent numerical tool, enabling a cost-effective testbed for WEC experimentation, analysis and optimisation. Different methods for simulating the fluid dynamics and fluid structure interaction (FSI) within the NWT have been developed over the years, with increasing levels of fidelity, and associated computational expense. In the past, the high computational requirements largely precluded Computational Fluid Dynamics (CFD) from being applied to WEC analysis. However, the continual improvement and availability of high performance computing has led to the steady increase of CFD-based NWTs (CNWT) for WEC experiments. No attempt has yet been undertaken to comprehensively review CNWT approaches for WECs. This paper fills this gap and presents a thorough review of high-fidelity numerical modelling of WECs using CNWTs. In addition to collating the published literature, this review tries to make a step towards a best practice guideline for the applications of CFD in the field of wave energy.

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Section: Large Eddy Simulation (Les)mentioning

confidence: 99%

High-fidelity numerical modelling of ocean wave energy systems: A review of computational fluid dynamics-based numerical wave tanks

Windt

Davidson

Ringwood

2018

Renewable and Sustainable Energy Reviews

167

View full text Add to dashboard Cite

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“…Yang et al [41] found a significant difference between the 2D-and 3D-approach for multi-bodies in a numerical wave tank. Different examples of a full coupling in 3D include propeller blades [42], offshore wind turbine towers [43], OWC [44], and point-absorbing WEC [45]. Alternatively, FLOW-3D leaves the grid constant and changes the discretisation of the geometry depending on the object's movement [46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Comparison of a Floating Cylinder with Solid and Water Ballast

Gabl

Davey

Nixon

et al. 2019

Water

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Modelling and understanding the motion of water filled floating objects is important for a wide range of applications including the behaviour of ships and floating platforms. Previous studies either investigated only small movements or applied a very specific (ship) geometry. The presented experiments are conducted using the simplified geometry of an open topped hollow cylinder ballasted to different displacements. Regular waves are used to excite the floating structure, which exhibits rotation angles of over 20 degrees and a heave motion double that of the wave amplitude. Four different drafts are investigated, each with two different ballast options: with (water) and without (solid) a free surface. The comparison shows a small difference in the body’s three translational motions as well as the rotation around the normal axis to the water surface. Significant differences are observed in the rotation about the wave direction comparable to parametric rolling as seen in ships. The three bigger drafts with free surface switch the dominant global rotation direction from pitch to roll, which can clearly be attributed to the sloshing of the internal water. The presented study provides a new dataset and comparison of varying ballast types on device motions, which may be used for future validation experiments.

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“…Numerical Modeling [139][140][141][142][143] Numerical and Experimental [144][145][146][147][148] Physical Experiment [149][150][151][152][153] Consequently, the simulations of the floating WECs still need to rely on the linear potential theory. Time-domain simulations were performed to integrate nonlinear adverse effects with the aid of the methods of convolution like van Oortmerssen [154] or Cummins [155].…”

Section: Type Of Approach References Of Publicationsmentioning

confidence: 99%

Review of Wave Energy Converter and Design of Mooring System

et al. 2020

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In recent decades, the emphasis on renewable resources has grown considerably, leading to significant advances in the sector of wave energy. Nevertheless, the market cannot still be considered as commercialized, as there are still other obstacles in the mooring system for wave energy converters (WECs). The mooring system must be designed to not negatively impact the WEC’s efficiency and reduce the mooring loads. Firstly, the overview of the types of wave energy converters (WECs) are classified through operational principle, absorbing wave direction, location, and power take-off, respectively, and the power production analysis and design challenges of WECs are summarized. Then, the mooring materials, configurations, requirements, and the modeling approaches for WECs are introduced. Finally, the design of mooring systems, including the design considerations and standards, analysis models, software, current research focus, and challenges are discussed.

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Development of a free heaving OWC model with non-linear PTO interaction

Cited by 17 publications

References 6 publications

High-fidelity numerical modelling of ocean wave energy systems: A review of computational fluid dynamics-based numerical wave tanks

High-fidelity numerical modelling of ocean wave energy systems: A review of computational fluid dynamics-based numerical wave tanks

Comparison of a Floating Cylinder with Solid and Water Ballast

Review of Wave Energy Converter and Design of Mooring System

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