Focused wave interactions with floating structures: a blind comparative study: a blind comparative study

Edward J. Ransley; Scott A. Brown; Martyn Hann; Deborah M. Greaves; Christian Windt; John Ringwood; Josh Davidson; Pal Schmitt; Shiqiang Yan; Junxian X. Wang; Jinghua H. Wang; Qingwei Ma; Zhihua Xie; Giuseppe Giorgi; Jack Hughes; Alison Williams; Ian Masters; Zaibin Lin; Hao Chen; Ling Qian; Zhihua Ma; Qiang Chen; Haoyu Ding; Jun Zang; Jennifer van Rij; Yi-Hsiang Yu; Zhaobin Li; Benjamin Bouscasse; Guillaume Ducrozet; Harry Bingham

doi:10.1680/jencm.20.00006

Focused wave interactions with floating structures: a blind comparative study: a blind comparative study

Edward J. Ransley
, Scott A. Brown
, Martyn Hann
, Deborah M. Greaves
, Christian Windt
, John Ringwood
, Josh Davidson
, Pal Schmitt
, Shiqiang Yan
, Junxian X. Wang
, Jinghua H. Wang
, Qingwei Ma
, Zhihua Xie
, Giuseppe Giorgi
, Jack Hughes
, Alison Williams
, Ian Masters
, Zaibin Lin
, Hao Chen
, Ling Qian

Zhihua Ma, Qiang Chen, Haoyu Ding, Jun Zang, Jennifer van Rij, Yi-Hsiang Yu, Zhaobin Li, Benjamin Bouscasse, Guillaume Ducrozet, Harry Bingham

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

Abstract

The paper presents results from the Collaborative Computational Project in Wave Structure Interaction (CCP-WSI) Blind Test Series 2. Without prior access to the physical data, participants, with numerical methods ranging from low-fidelity linear models to fully non-linear Navier–Stokes (NS) solvers, simulate the interaction between focused wave events and two separate, taut-moored, floating structures: a hemispherical-bottomed cylinder and a cylinder with a moonpool. The ‘blind’ numerical predictions for heave, surge, pitch and mooring load, are compared against physical measurements. Dynamic time warping is used to quantify the predictive capability of participating methods. In general, NS solvers and hybrid methods give more accurate predictions; however, heave amplitude is predicted reasonably well by all methods; and a WEC-Sim implementation, with CFD-informed viscous terms, demonstrates comparable predictive capability to even the stronger NS solvers. Large variations in the solutions are observed (even among similar methods), highlighting a need for standardisation in the numerical modelling of WSI problems.

Original language	English
Pages (from-to)	46-61
Number of pages	16
Journal	Proceedings of the ICE - Engineering and Computational Mechanics
Volume	174
Issue number	1
DOIs	https://doi.org/10.1680/jencm.20.00006
Publication status	Published - Mar 2021

Bibliographical note

The CCP-WSI Working Group would like to acknowledge the participants of the CCP-WSI Blind Test Series 2 for their contributions as well as the European Wave and Tidal Energy Conference (EWTEC) 2019 organisers for their support. This research study was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under contract number DE-AC36-08GO28308. The views expressed in this paper do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the paper for publication, acknowledges that the U.S. Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this study, or allow others to do so, for U.S. Government purposes.

Data Availability Statement

The full physical data set from the CCP-WSI Blind Test Series 2 is available as a long-standing test case for future benchmarking and can be downloaded from CCP-WSI

Funding

This work is funded by the Engineering and Physical Sciences Research Council (EPSRC) through projects EP/M022382/1,EP/S000747/1 and EP/P026109/1. Funding provided by U.S. Department of Energy Office of Energy Efficiency and Renewable Energy.

Funders	Funder number
Engineering and Physical Sciences Research Council	EP/M022382/1, EP/S000747/1, EP/P026109/1
U.S. Department of Energy

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Cite this

Ransley, E. J., Brown, S. A., Hann, M., Greaves, D. M., Windt, C., Ringwood, J., Davidson, J., Schmitt, P., Yan, S., Wang, J. X., Wang, J. H., Ma, Q., Xie, Z., Giorgi, G., Hughes, J., Williams, A., Masters, I., Lin, Z., Chen, H., ... Bingham, H. (2021). Focused wave interactions with floating structures: a blind comparative study: a blind comparative study. Proceedings of the ICE - Engineering and Computational Mechanics, 174(1), 46-61. https://doi.org/10.1680/jencm.20.00006

Ransley, EJ, Brown, SA, Hann, M, Greaves, DM, Windt, C, Ringwood, J, Davidson, J, Schmitt, P, Yan, S, Wang, JX, Wang, JH, Ma, Q, Xie, Z, Giorgi, G, Hughes, J, Williams, A, Masters, I, Lin, Z, Chen, H, Qian, L, Ma, Z, Chen, Q, Ding, H, Zang, J, Rij, JV, Yu, Y-H, Li, Z, Bouscasse, B, Ducrozet, G & Bingham, H 2021, 'Focused wave interactions with floating structures: a blind comparative study: a blind comparative study', Proceedings of the ICE - Engineering and Computational Mechanics, vol. 174, no. 1, pp. 46-61. https://doi.org/10.1680/jencm.20.00006

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title = "Focused wave interactions with floating structures: a blind comparative study: a blind comparative study",

abstract = " The paper presents results from the Collaborative Computational Project in Wave Structure Interaction (CCP-WSI) Blind Test Series 2. Without prior access to the physical data, participants, with numerical methods ranging from low-fidelity linear models to fully non-linear Navier–Stokes (NS) solvers, simulate the interaction between focused wave events and two separate, taut-moored, floating structures: a hemispherical-bottomed cylinder and a cylinder with a moonpool. The {\textquoteleft}blind{\textquoteright} numerical predictions for heave, surge, pitch and mooring load, are compared against physical measurements. Dynamic time warping is used to quantify the predictive capability of participating methods. In general, NS solvers and hybrid methods give more accurate predictions; however, heave amplitude is predicted reasonably well by all methods; and a WEC-Sim implementation, with CFD-informed viscous terms, demonstrates comparable predictive capability to even the stronger NS solvers. Large variations in the solutions are observed (even among similar methods), highlighting a need for standardisation in the numerical modelling of WSI problems.",

author = "Ransley, \{Edward J.\} and Brown, \{Scott A.\} and Martyn Hann and Greaves, \{Deborah M.\} and Christian Windt and John Ringwood and Josh Davidson and Pal Schmitt and Shiqiang Yan and Wang, \{Junxian X.\} and Wang, \{Jinghua H.\} and Qingwei Ma and Zhihua Xie and Giuseppe Giorgi and Jack Hughes and Alison Williams and Ian Masters and Zaibin Lin and Hao Chen and Ling Qian and Zhihua Ma and Qiang Chen and Haoyu Ding and Jun Zang and Rij, \{Jennifer van\} and Yi-Hsiang Yu and Zhaobin Li and Benjamin Bouscasse and Guillaume Ducrozet and Harry Bingham",

note = "The CCP-WSI Working Group would like to acknowledge the participants of the CCP-WSI Blind Test Series 2 for their contributions as well as the European Wave and Tidal Energy Conference (EWTEC) 2019 organisers for their support. This research study was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under contract number DE-AC36-08GO28308. The views expressed in this paper do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the paper for publication, acknowledges that the U.S. Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this study, or allow others to do so, for U.S. Government purposes. ",

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AU - Davidson, Josh

AU - Schmitt, Pal

AU - Yan, Shiqiang

AU - Wang, Junxian X.

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AU - Ma, Qingwei

AU - Xie, Zhihua

AU - Giorgi, Giuseppe

AU - Hughes, Jack

AU - Williams, Alison

AU - Masters, Ian

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AU - Chen, Hao

AU - Qian, Ling

AU - Ma, Zhihua

AU - Chen, Qiang

AU - Ding, Haoyu

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AU - Bouscasse, Benjamin

AU - Ducrozet, Guillaume

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PY - 2021/3

Y1 - 2021/3

N2 - The paper presents results from the Collaborative Computational Project in Wave Structure Interaction (CCP-WSI) Blind Test Series 2. Without prior access to the physical data, participants, with numerical methods ranging from low-fidelity linear models to fully non-linear Navier–Stokes (NS) solvers, simulate the interaction between focused wave events and two separate, taut-moored, floating structures: a hemispherical-bottomed cylinder and a cylinder with a moonpool. The ‘blind’ numerical predictions for heave, surge, pitch and mooring load, are compared against physical measurements. Dynamic time warping is used to quantify the predictive capability of participating methods. In general, NS solvers and hybrid methods give more accurate predictions; however, heave amplitude is predicted reasonably well by all methods; and a WEC-Sim implementation, with CFD-informed viscous terms, demonstrates comparable predictive capability to even the stronger NS solvers. Large variations in the solutions are observed (even among similar methods), highlighting a need for standardisation in the numerical modelling of WSI problems.

AB - The paper presents results from the Collaborative Computational Project in Wave Structure Interaction (CCP-WSI) Blind Test Series 2. Without prior access to the physical data, participants, with numerical methods ranging from low-fidelity linear models to fully non-linear Navier–Stokes (NS) solvers, simulate the interaction between focused wave events and two separate, taut-moored, floating structures: a hemispherical-bottomed cylinder and a cylinder with a moonpool. The ‘blind’ numerical predictions for heave, surge, pitch and mooring load, are compared against physical measurements. Dynamic time warping is used to quantify the predictive capability of participating methods. In general, NS solvers and hybrid methods give more accurate predictions; however, heave amplitude is predicted reasonably well by all methods; and a WEC-Sim implementation, with CFD-informed viscous terms, demonstrates comparable predictive capability to even the stronger NS solvers. Large variations in the solutions are observed (even among similar methods), highlighting a need for standardisation in the numerical modelling of WSI problems.

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Focused wave interactions with floating structures: a blind comparative study: a blind comparative study

Abstract

Bibliographical note

Data Availability Statement

Funding

Access to Document

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