A Blind Comparative Study of Focused Wave Interactions with Floating Structures (CCP-WSI Blind Test Series 3)

Ransley, Edward; Yan, Shiqiang; Brown, Scott; Hann, Martyn; Graham, David I.; Windt, Christian; Schmitt, Pál; Davidson, Josh; Ringwood, John V.; Musiedlak, Pierre Henri; Wang, Jinghua; Wang, Junxian; Ma, Qingwei; Xie, Zhihua; Zhang, Ningbo; Zheng, Xing; Giorgi, Giuseppe; Chen, Hao; Lin, Zhifang; Qian, Ling; Ma, Zhihua; Bai, Wei; Chen, Qiang; Zang, Jun; Ding, Haoyu; Cheng, Lin; Zheng, Jinhai; Gu, Huanghe; Gong, Xiwu; Liu, Zhenghao; Zhuang, Yuan; Wan, Decheng; Bingham, Harry B.; Greaves, Deborah

doi:10.17736/ijope.2020.jc774

Cited by 43 publications

(43 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two different WEC structures, W1 and W2, are considered in the following. The structures are based on the systems employed in the blind test series 2 and 3 of the collaborative code project wave structure interaction (CCP-WSI) [55,56] and resemble axisymmetric, cylindrical point-absorber-type devices. The relevant physical properties are shown in Figure 3.…”

Section: Wec Structuresmentioning

confidence: 99%

Investigation of Turbulence Modeling for Point-Absorber-Type Wave Energy Converters

2020

Self Cite

View full text Add to dashboard Cite

Reviewing the literature of CFD-based numerical wave tanks for wave energy applications, it can be observed that different flow conditions and different turbulence models are applied during numerical wave energy converter (WEC) experiments. No single turbulence model can be identified as an `industry standard’ for WEC modeling. The complexity of the flow field around a WEC, together with the strong dependency of turbulence effects on the shape, operational conditions, and external forces, hampers the formulation of such an `industry standard’. Furthermore, the conceptually different flow characteristics (i.e., oscillating, free surface flows), compared to the design cases of most turbulence models (i.e., continuous single-phase flow), can be identified as a source for the potential lack of accuracy of turbulence models for WEC applications. This communication performs a first step towards analyzing the accuracy and necessity of modeling turbulence effects, by means of turbulence models, within CFD-based NWTs for WEC applications. To that end, the influence of turbulence models and, in addition, the influence of the initial turbulence intensity is investigated based on different wave–structure interaction cases considering two separately validated WEC models. The results highlight the complexity of such a `turbulence analysis’ and the study suggests specific future work to get a better understanding of the model requirements for the flow field around WECs.

show abstract

Section: Wec Structuresmentioning

confidence: 99%

Investigation of Turbulence Modeling for Point-Absorber-Type Wave Energy Converters

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The effectiveness of the hybrid model on improving the computational efficiency has been reported by recent CCP-WSI blind test for modelling the interaction between the focused wave and the floating bodies (Ransley, Yan and Brown et al, 2020). It was concluded that the hybrid methods combining the This paper contributes to the CCP-WSI Blind Test Series 2, in which the cases with two simplified WEC models subjected to focusing waves with different wave conditions are set.…”

Section: Introductionmentioning

confidence: 94%

“…the computational domain and mesh sizes, are considerably influenced by users' experiences, since no specific domain/mesh are provided for standardisation. Nevertheless, the comparison byRansley, Yan and Brown et al (2020) may demonstrate a better practical performance of the hybrid model for WSI problems than both the potential theory and NS solvers.…”

mentioning

confidence: 98%

Modelling of focused wave interaction with wave energy converter models using qaleFOAM

Wang

Yan

et al. 2020

Proceedings of the Institution of Civil Engineers - Engineering

Self Cite

View full text Add to dashboard Cite

The paper presents a numerical investigation of the interaction between focused waves and wave energy converter (WEC) models using a hybrid solver, qaleFOAM, which couples a two-phase incompressible Navier-Stokes (NS) solver OpenFOAM/InterDyMFoam with the Quasi Lagrangian-Eulerian Finite Element Method (QALE-FEM) based on the fully nonlinear potential theory (FNPT) using the domaindecomposition approach. In the qaleFOAM, the NS solver deals with a small region near the structures (NS domain), where the viscous effect may be significant; the QALE-FEM covers the remaining computational domain (FNPT domain); an overlap (transitional) zone is applied between two domains. The WEC models, mooring system and the wave conditions are specified by the CCP-WSI (Collaborative Computational Project in Wave-Structure Interaction) Blind Test Series 2. In the numerical simulation, the incident wave is generated in the FNPT domain using a self-correction wavemaker and propagates into the NS domain through the coupling boundaries and attached transitional zones. An improved passive wave absorber is imposed at the outlet of the NS domain for wave absorption. The practical performance of the qaleFOAM is demonstrated by comparing its prediction with the experimental data, including the wave elevation, motion responses (surge, heave and pitch) and mooring load.

show abstract

“…Ransley et al [7,8] present the results of the Blind Test Series 2 and 3, organised by the Collaborative Computational Project in WSI (CCP-WSI), considering two moored, floating point absorber type WECs, exposed to focused waves.…”

Section: Related Studiesmentioning

confidence: 99%

Validation of a CFD-Based Numerical Wave Tank Model of the 1/20th Scale Wavestar Wave Energy Converter

Windt

Faedo

García-Violini

et al. 2020

Fluids

Self Cite

View full text Add to dashboard Cite

Numerical wave tanks (NWTs) provide efficient test beds for the numerical analysis at various stages during the development of wave energy converters (WECs). To ensure the acquisition of accurate, high-fidelity data sets, validation of NWTs is a crucial step. However, using experimental data as reference during model validation, exact knowledge of all system parameters is required, which may not always be available, thus making an incremental validation inevitable. The present paper documents the numerical model validation of a 1/20 scale Wavestar WEC. The validation is performed considering different test case of increasing complexity: wave-only, wave excitation force, free decay, forced oscillation, and wave-induced motion cases. The results show acceptable agreement between the numerical and experimental data so that, under the well-known modelling constraints for mechanical friction and uncertainties in the physical model properties, the developed numerical model can be declared as validated.

show abstract

A Blind Comparative Study of Focused Wave Interactions with Floating Structures (CCP-WSI Blind Test Series 3)

Cited by 43 publications

References 22 publications

Investigation of Turbulence Modeling for Point-Absorber-Type Wave Energy Converters

Investigation of Turbulence Modeling for Point-Absorber-Type Wave Energy Converters

Modelling of focused wave interaction with wave energy converter models using qaleFOAM

Validation of a CFD-Based Numerical Wave Tank Model of the 1/20th Scale Wavestar Wave Energy Converter

Contact Info

Product

Resources

About