Numerical Modelling of Hydrokinetic Turbines Immersed in Complex Topography using Non-Rotative Actuator Discs

Cyril Mokrani (1) , Mireille Bossy (2, 3) , Marcos Di Iorio (1) , Antoine Rousseau (4)

1 MERIC - Marine Energy Research & Innovation Center [Santiago]
2 COMUE UCA - COMUE Université Côte d'Azur (2015-2019)
3 TOSCA - TO Simulate and CAlibrate stochastic models
4 LEMON - Littoral, Environment: MOdels and Numerics

Recent studies have pointed out the potential of several coastal or river areas to provide significant energy resources in the near future. However, technological processes for extracting energy using Marine Current Energy Converters (MCEC) are not generically "field-ready" and still require significant research to be set up. The present work comes within this framework: we develop the numerical model OceaPoS, useful to carry out a comprehensive description of turbulent flow patterns past MCEC and forward optimize the turbine arrays configurations and evaluate their environmental effects. The OceaPos model consists in describing the fluid as an ensemble of Lagrangian particles ruled by a Stochastic process. OceaPos follows the same methodology than SDM-WindPoS model for wind farm simulations and adapts the Lagrangian stochastic downscaling method (SDM) of Bossy et al. (2016, 2018) to the tidal and oceanic boundary layer. We also introduce a Lagrangian version of actuator discs to take account of one or several MCEC's devices and their effects on the flow dynamics. Several benchmarks are presented, and numerical predictions are compared to experimental results.

Mots clés: Stochastic Lagrangian models; Marine current energy converters; Turbulent flows; Hydrodynamics; Stochastic numerical model; Tidal and oceanic turbulent flow

Domaines: Analyse numérique [math.NA]; Modélisation et simulation; Ingénierie de l'environnement; Océan, Atmosphère

Cyril Mokrani, Mireille Bossy, Marcos Di Iorio, Antoine Rousseau. Numerical Modelling of Hydrokinetic Turbines Immersed in Complex Topography using Non-Rotative Actuator Discs. Three Years Promoting the Development of Marine Renewable Energy in Chile 2015 - 2018, MERIC-Marine Energy and Innovation Center, 2019, 978-956-09327-0-9. ⟨hal-01966351⟩