Three-dimensional modelling of suspended sediment transport in the far wake of tidal stream turbines

Xiaorong Li, Ming Li, Laurent O. Amoudry, Rafael Ramirez-Mendoza, Peter D. Thorne, Qingyang Song, Peng Zheng, Stephen M. Simmons, Laura-Beth Jordan and Stuart J. McLelland

Renewable Energy, 2020, vol. 151, issue C, 956-965

Abstract: A three-dimensional tidal turbine simulation based on an oceanographic numerical model has been tested for suspended sediment calculation, particularly in the wake of a standalone tidal turbine. The results suggest a need for further improvement of the model in order to obtain correct predictions of suspension strength of the wake and suspended sediment concentration under the influence of a turbine (compared to measured data). Due to the wide use of FVCOM in coastal applications where turbines are commonly installed, it proves necessary to address this issue. Two approaches with respect to modifying bed shear stress and turbulent mixing calculations in the presence of a turbine are proposed and tested in this research. Using data collected in the laboratory as reference, the turbulent mixing enhancement approach is shown to be effective. A series of tests are carried out to identify the impact of the turbine on suspended sediment transport in its vicinity. The results suggest that the impact is highly dependent upon the sediment grain size.

Keywords: Tidal stream energy; Three-dimensional modelling; Suspended sediment transport; Mixing enhancement; Additional shear stress (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:151:y:2020:i:c:p:956-965

DOI: 10.1016/j.renene.2019.11.096

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