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Article Turbulence Modeling for Accurate Wake Prediction in Tidal Turbine Arrays
Author(s) M. Shives (ICOE 2014)
Tags Tidal, Turbulence, Turbine, Actuator disc, RANS
Type Papers
File michael-shives-turbulence-modeling-for-accurate-wake-prediction-in-tidal-turbine-arrays.pdf

This paper proposes to alter standard turbulence models in two ways. The first is to limit the eddy-viscosity in close proximity to the turbine rotor to reduce the initial mixing rate. The second is to add a source of turbulent kinetic energy in the near-wake to compensate for the fact that the actuator disk approach does not resolve the discrete vortices trailed from the rotor, therefore under-predicting the generation of turbulence that occurs when the vortices break-down. Comparing to two lab-scale experiments, these modifications showed significant improvement in predicting the wake recovery downstream of single turbines, and small arrays. 

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