Focused wave interactions with floating structures: a blind comparative study

Ransley, E. J. et al. (2021) Focused wave interactions with floating structures: a blind comparative study. Proceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics, 174(1), pp. 46-61. (doi: 10.1680/jencm.20.00006)

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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.

Item Type:Articles
Additional Information: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 work is funded by the Engineering and Physical Sciences Research Council (EPSRC) through projects EP/M022382/1, EP/S000747/1 and EP/P026109/1. 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. Funding provided by U.S. Department of Energy Office of Energy Efficiency and Renewable Energy.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Chen, Dr Hao
Authors: 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., Qian, L., Ma, Z., Chen, Q., Ding, H., Zang, J., van Rij, J., Yu, Y.-H., Li, Z., Bouscasse, B., Ducrozet, G., and Bingham, H.
College/School:College of Science and Engineering > School of Engineering
Journal Name:Proceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics
Publisher:ICE Publishing
ISSN:1755-0777
ISSN (Online):1755-0785
Published Online:04 December 2020

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